COPYING
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     1 
       
     2                     GNU GENERAL PUBLIC LICENSE
       
     3                        Version 3, 29 June 2007
       
     4 
       
     5  Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
       
     6  Everyone is permitted to copy and distribute verbatim copies
       
     7  of this license document, but changing it is not allowed.
       
     8 
       
     9                             Preamble
       
    10 
       
    11   The GNU General Public License is a free, copyleft license for
       
    12 software and other kinds of works.
       
    13 
       
    14   The licenses for most software and other practical works are designed
       
    15 to take away your freedom to share and change the works.  By contrast,
       
    16 the GNU General Public License is intended to guarantee your freedom to
       
    17 share and change all versions of a program--to make sure it remains free
       
    18 software for all its users.  We, the Free Software Foundation, use the
       
    19 GNU General Public License for most of our software; it applies also to
       
    20 any other work released this way by its authors.  You can apply it to
       
    21 your programs, too.
       
    22 
       
    23   When we speak of free software, we are referring to freedom, not
       
    24 price.  Our General Public Licenses are designed to make sure that you
       
    25 have the freedom to distribute copies of free software (and charge for
       
    26 them if you wish), that you receive source code or can get it if you
       
    27 want it, that you can change the software or use pieces of it in new
       
    28 free programs, and that you know you can do these things.
       
    29 
       
    30   To protect your rights, we need to prevent others from denying you
       
    31 these rights or asking you to surrender the rights.  Therefore, you have
       
    32 certain responsibilities if you distribute copies of the software, or if
       
    33 you modify it: responsibilities to respect the freedom of others.
       
    34 
       
    35   For example, if you distribute copies of such a program, whether
       
    36 gratis or for a fee, you must pass on to the recipients the same
       
    37 freedoms that you received.  You must make sure that they, too, receive
       
    38 or can get the source code.  And you must show them these terms so they
       
    39 know their rights.
       
    40 
       
    41   Developers that use the GNU GPL protect your rights with two steps:
       
    42 (1) assert copyright on the software, and (2) offer you this License
       
    43 giving you legal permission to copy, distribute and/or modify it.
       
    44 
       
    45   For the developers' and authors' protection, the GPL clearly explains
       
    46 that there is no warranty for this free software.  For both users' and
       
    47 authors' sake, the GPL requires that modified versions be marked as
       
    48 changed, so that their problems will not be attributed erroneously to
       
    49 authors of previous versions.
       
    50 
       
    51   Some devices are designed to deny users access to install or run
       
    52 modified versions of the software inside them, although the manufacturer
       
    53 can do so.  This is fundamentally incompatible with the aim of
       
    54 protecting users' freedom to change the software.  The systematic
       
    55 pattern of such abuse occurs in the area of products for individuals to
       
    56 use, which is precisely where it is most unacceptable.  Therefore, we
       
    57 have designed this version of the GPL to prohibit the practice for those
       
    58 products.  If such problems arise substantially in other domains, we
       
    59 stand ready to extend this provision to those domains in future versions
       
    60 of the GPL, as needed to protect the freedom of users.
       
    61 
       
    62   Finally, every program is threatened constantly by software patents.
       
    63 States should not allow patents to restrict development and use of
       
    64 software on general-purpose computers, but in those that do, we wish to
       
    65 avoid the special danger that patents applied to a free program could
       
    66 make it effectively proprietary.  To prevent this, the GPL assures that
       
    67 patents cannot be used to render the program non-free.
       
    68 
       
    69   The precise terms and conditions for copying, distribution and
       
    70 modification follow.
       
    71 
       
    72                        TERMS AND CONDITIONS
       
    73 
       
    74   0. Definitions.
       
    75 
       
    76   "This License" refers to version 3 of the GNU General Public License.
       
    77 
       
    78   "Copyright" also means copyright-like laws that apply to other kinds of
       
    79 works, such as semiconductor masks.
       
    80 
       
    81   "The Program" refers to any copyrightable work licensed under this
       
    82 License.  Each licensee is addressed as "you".  "Licensees" and
       
    83 "recipients" may be individuals or organizations.
       
    84 
       
    85   To "modify" a work means to copy from or adapt all or part of the work
       
    86 in a fashion requiring copyright permission, other than the making of an
       
    87 exact copy.  The resulting work is called a "modified version" of the
       
    88 earlier work or a work "based on" the earlier work.
       
    89 
       
    90   A "covered work" means either the unmodified Program or a work based
       
    91 on the Program.
       
    92 
       
    93   To "propagate" a work means to do anything with it that, without
       
    94 permission, would make you directly or secondarily liable for
       
    95 infringement under applicable copyright law, except executing it on a
       
    96 computer or modifying a private copy.  Propagation includes copying,
       
    97 distribution (with or without modification), making available to the
       
    98 public, and in some countries other activities as well.
       
    99 
       
   100   To "convey" a work means any kind of propagation that enables other
       
   101 parties to make or receive copies.  Mere interaction with a user through
       
   102 a computer network, with no transfer of a copy, is not conveying.
       
   103 
       
   104   An interactive user interface displays "Appropriate Legal Notices"
       
   105 to the extent that it includes a convenient and prominently visible
       
   106 feature that (1) displays an appropriate copyright notice, and (2)
       
   107 tells the user that there is no warranty for the work (except to the
       
   108 extent that warranties are provided), that licensees may convey the
       
   109 work under this License, and how to view a copy of this License.  If
       
   110 the interface presents a list of user commands or options, such as a
       
   111 menu, a prominent item in the list meets this criterion.
       
   112 
       
   113   1. Source Code.
       
   114 
       
   115   The "source code" for a work means the preferred form of the work
       
   116 for making modifications to it.  "Object code" means any non-source
       
   117 form of a work.
       
   118 
       
   119   A "Standard Interface" means an interface that either is an official
       
   120 standard defined by a recognized standards body, or, in the case of
       
   121 interfaces specified for a particular programming language, one that
       
   122 is widely used among developers working in that language.
       
   123 
       
   124   The "System Libraries" of an executable work include anything, other
       
   125 than the work as a whole, that (a) is included in the normal form of
       
   126 packaging a Major Component, but which is not part of that Major
       
   127 Component, and (b) serves only to enable use of the work with that
       
   128 Major Component, or to implement a Standard Interface for which an
       
   129 implementation is available to the public in source code form.  A
       
   130 "Major Component", in this context, means a major essential component
       
   131 (kernel, window system, and so on) of the specific operating system
       
   132 (if any) on which the executable work runs, or a compiler used to
       
   133 produce the work, or an object code interpreter used to run it.
       
   134 
       
   135   The "Corresponding Source" for a work in object code form means all
       
   136 the source code needed to generate, install, and (for an executable
       
   137 work) run the object code and to modify the work, including scripts to
       
   138 control those activities.  However, it does not include the work's
       
   139 System Libraries, or general-purpose tools or generally available free
       
   140 programs which are used unmodified in performing those activities but
       
   141 which are not part of the work.  For example, Corresponding Source
       
   142 includes interface definition files associated with source files for
       
   143 the work, and the source code for shared libraries and dynamically
       
   144 linked subprograms that the work is specifically designed to require,
       
   145 such as by intimate data communication or control flow between those
       
   146 subprograms and other parts of the work.
       
   147 
       
   148   The Corresponding Source need not include anything that users
       
   149 can regenerate automatically from other parts of the Corresponding
       
   150 Source.
       
   151 
       
   152   The Corresponding Source for a work in source code form is that
       
   153 same work.
       
   154 
       
   155   2. Basic Permissions.
       
   156 
       
   157   All rights granted under this License are granted for the term of
       
   158 copyright on the Program, and are irrevocable provided the stated
       
   159 conditions are met.  This License explicitly affirms your unlimited
       
   160 permission to run the unmodified Program.  The output from running a
       
   161 covered work is covered by this License only if the output, given its
       
   162 content, constitutes a covered work.  This License acknowledges your
       
   163 rights of fair use or other equivalent, as provided by copyright law.
       
   164 
       
   165   You may make, run and propagate covered works that you do not
       
   166 convey, without conditions so long as your license otherwise remains
       
   167 in force.  You may convey covered works to others for the sole purpose
       
   168 of having them make modifications exclusively for you, or provide you
       
   169 with facilities for running those works, provided that you comply with
       
   170 the terms of this License in conveying all material for which you do
       
   171 not control copyright.  Those thus making or running the covered works
       
   172 for you must do so exclusively on your behalf, under your direction
       
   173 and control, on terms that prohibit them from making any copies of
       
   174 your copyrighted material outside their relationship with you.
       
   175 
       
   176   Conveying under any other circumstances is permitted solely under
       
   177 the conditions stated below.  Sublicensing is not allowed; section 10
       
   178 makes it unnecessary.
       
   179 
       
   180   3. Protecting Users' Legal Rights From Anti-Circumvention Law.
       
   181 
       
   182   No covered work shall be deemed part of an effective technological
       
   183 measure under any applicable law fulfilling obligations under article
       
   184 11 of the WIPO copyright treaty adopted on 20 December 1996, or
       
   185 similar laws prohibiting or restricting circumvention of such
       
   186 measures.
       
   187 
       
   188   When you convey a covered work, you waive any legal power to forbid
       
   189 circumvention of technological measures to the extent such circumvention
       
   190 is effected by exercising rights under this License with respect to
       
   191 the covered work, and you disclaim any intention to limit operation or
       
   192 modification of the work as a means of enforcing, against the work's
       
   193 users, your or third parties' legal rights to forbid circumvention of
       
   194 technological measures.
       
   195 
       
   196   4. Conveying Verbatim Copies.
       
   197 
       
   198   You may convey verbatim copies of the Program's source code as you
       
   199 receive it, in any medium, provided that you conspicuously and
       
   200 appropriately publish on each copy an appropriate copyright notice;
       
   201 keep intact all notices stating that this License and any
       
   202 non-permissive terms added in accord with section 7 apply to the code;
       
   203 keep intact all notices of the absence of any warranty; and give all
       
   204 recipients a copy of this License along with the Program.
       
   205 
       
   206   You may charge any price or no price for each copy that you convey,
       
   207 and you may offer support or warranty protection for a fee.
       
   208 
       
   209   5. Conveying Modified Source Versions.
       
   210 
       
   211   You may convey a work based on the Program, or the modifications to
       
   212 produce it from the Program, in the form of source code under the
       
   213 terms of section 4, provided that you also meet all of these conditions:
       
   214 
       
   215     a) The work must carry prominent notices stating that you modified
       
   216     it, and giving a relevant date.
       
   217 
       
   218     b) The work must carry prominent notices stating that it is
       
   219     released under this License and any conditions added under section
       
   220     7.  This requirement modifies the requirement in section 4 to
       
   221     "keep intact all notices".
       
   222 
       
   223     c) You must license the entire work, as a whole, under this
       
   224     License to anyone who comes into possession of a copy.  This
       
   225     License will therefore apply, along with any applicable section 7
       
   226     additional terms, to the whole of the work, and all its parts,
       
   227     regardless of how they are packaged.  This License gives no
       
   228     permission to license the work in any other way, but it does not
       
   229     invalidate such permission if you have separately received it.
       
   230 
       
   231     d) If the work has interactive user interfaces, each must display
       
   232     Appropriate Legal Notices; however, if the Program has interactive
       
   233     interfaces that do not display Appropriate Legal Notices, your
       
   234     work need not make them do so.
       
   235 
       
   236   A compilation of a covered work with other separate and independent
       
   237 works, which are not by their nature extensions of the covered work,
       
   238 and which are not combined with it such as to form a larger program,
       
   239 in or on a volume of a storage or distribution medium, is called an
       
   240 "aggregate" if the compilation and its resulting copyright are not
       
   241 used to limit the access or legal rights of the compilation's users
       
   242 beyond what the individual works permit.  Inclusion of a covered work
       
   243 in an aggregate does not cause this License to apply to the other
       
   244 parts of the aggregate.
       
   245 
       
   246   6. Conveying Non-Source Forms.
       
   247 
       
   248   You may convey a covered work in object code form under the terms
       
   249 of sections 4 and 5, provided that you also convey the
       
   250 machine-readable Corresponding Source under the terms of this License,
       
   251 in one of these ways:
       
   252 
       
   253     a) Convey the object code in, or embodied in, a physical product
       
   254     (including a physical distribution medium), accompanied by the
       
   255     Corresponding Source fixed on a durable physical medium
       
   256     customarily used for software interchange.
       
   257 
       
   258     b) Convey the object code in, or embodied in, a physical product
       
   259     (including a physical distribution medium), accompanied by a
       
   260     written offer, valid for at least three years and valid for as
       
   261     long as you offer spare parts or customer support for that product
       
   262     model, to give anyone who possesses the object code either (1) a
       
   263     copy of the Corresponding Source for all the software in the
       
   264     product that is covered by this License, on a durable physical
       
   265     medium customarily used for software interchange, for a price no
       
   266     more than your reasonable cost of physically performing this
       
   267     conveying of source, or (2) access to copy the
       
   268     Corresponding Source from a network server at no charge.
       
   269 
       
   270     c) Convey individual copies of the object code with a copy of the
       
   271     written offer to provide the Corresponding Source.  This
       
   272     alternative is allowed only occasionally and noncommercially, and
       
   273     only if you received the object code with such an offer, in accord
       
   274     with subsection 6b.
       
   275 
       
   276     d) Convey the object code by offering access from a designated
       
   277     place (gratis or for a charge), and offer equivalent access to the
       
   278     Corresponding Source in the same way through the same place at no
       
   279     further charge.  You need not require recipients to copy the
       
   280     Corresponding Source along with the object code.  If the place to
       
   281     copy the object code is a network server, the Corresponding Source
       
   282     may be on a different server (operated by you or a third party)
       
   283     that supports equivalent copying facilities, provided you maintain
       
   284     clear directions next to the object code saying where to find the
       
   285     Corresponding Source.  Regardless of what server hosts the
       
   286     Corresponding Source, you remain obligated to ensure that it is
       
   287     available for as long as needed to satisfy these requirements.
       
   288 
       
   289     e) Convey the object code using peer-to-peer transmission, provided
       
   290     you inform other peers where the object code and Corresponding
       
   291     Source of the work are being offered to the general public at no
       
   292     charge under subsection 6d.
       
   293 
       
   294   A separable portion of the object code, whose source code is excluded
       
   295 from the Corresponding Source as a System Library, need not be
       
   296 included in conveying the object code work.
       
   297 
       
   298   A "User Product" is either (1) a "consumer product", which means any
       
   299 tangible personal property which is normally used for personal, family,
       
   300 or household purposes, or (2) anything designed or sold for incorporation
       
   301 into a dwelling.  In determining whether a product is a consumer product,
       
   302 doubtful cases shall be resolved in favor of coverage.  For a particular
       
   303 product received by a particular user, "normally used" refers to a
       
   304 typical or common use of that class of product, regardless of the status
       
   305 of the particular user or of the way in which the particular user
       
   306 actually uses, or expects or is expected to use, the product.  A product
       
   307 is a consumer product regardless of whether the product has substantial
       
   308 commercial, industrial or non-consumer uses, unless such uses represent
       
   309 the only significant mode of use of the product.
       
   310 
       
   311   "Installation Information" for a User Product means any methods,
       
   312 procedures, authorization keys, or other information required to install
       
   313 and execute modified versions of a covered work in that User Product from
       
   314 a modified version of its Corresponding Source.  The information must
       
   315 suffice to ensure that the continued functioning of the modified object
       
   316 code is in no case prevented or interfered with solely because
       
   317 modification has been made.
       
   318 
       
   319   If you convey an object code work under this section in, or with, or
       
   320 specifically for use in, a User Product, and the conveying occurs as
       
   321 part of a transaction in which the right of possession and use of the
       
   322 User Product is transferred to the recipient in perpetuity or for a
       
   323 fixed term (regardless of how the transaction is characterized), the
       
   324 Corresponding Source conveyed under this section must be accompanied
       
   325 by the Installation Information.  But this requirement does not apply
       
   326 if neither you nor any third party retains the ability to install
       
   327 modified object code on the User Product (for example, the work has
       
   328 been installed in ROM).
       
   329 
       
   330   The requirement to provide Installation Information does not include a
       
   331 requirement to continue to provide support service, warranty, or updates
       
   332 for a work that has been modified or installed by the recipient, or for
       
   333 the User Product in which it has been modified or installed.  Access to a
       
   334 network may be denied when the modification itself materially and
       
   335 adversely affects the operation of the network or violates the rules and
       
   336 protocols for communication across the network.
       
   337 
       
   338   Corresponding Source conveyed, and Installation Information provided,
       
   339 in accord with this section must be in a format that is publicly
       
   340 documented (and with an implementation available to the public in
       
   341 source code form), and must require no special password or key for
       
   342 unpacking, reading or copying.
       
   343 
       
   344   7. Additional Terms.
       
   345 
       
   346   "Additional permissions" are terms that supplement the terms of this
       
   347 License by making exceptions from one or more of its conditions.
       
   348 Additional permissions that are applicable to the entire Program shall
       
   349 be treated as though they were included in this License, to the extent
       
   350 that they are valid under applicable law.  If additional permissions
       
   351 apply only to part of the Program, that part may be used separately
       
   352 under those permissions, but the entire Program remains governed by
       
   353 this License without regard to the additional permissions.
       
   354 
       
   355   When you convey a copy of a covered work, you may at your option
       
   356 remove any additional permissions from that copy, or from any part of
       
   357 it.  (Additional permissions may be written to require their own
       
   358 removal in certain cases when you modify the work.)  You may place
       
   359 additional permissions on material, added by you to a covered work,
       
   360 for which you have or can give appropriate copyright permission.
       
   361 
       
   362   Notwithstanding any other provision of this License, for material you
       
   363 add to a covered work, you may (if authorized by the copyright holders of
       
   364 that material) supplement the terms of this License with terms:
       
   365 
       
   366     a) Disclaiming warranty or limiting liability differently from the
       
   367     terms of sections 15 and 16 of this License; or
       
   368 
       
   369     b) Requiring preservation of specified reasonable legal notices or
       
   370     author attributions in that material or in the Appropriate Legal
       
   371     Notices displayed by works containing it; or
       
   372 
       
   373     c) Prohibiting misrepresentation of the origin of that material, or
       
   374     requiring that modified versions of such material be marked in
       
   375     reasonable ways as different from the original version; or
       
   376 
       
   377     d) Limiting the use for publicity purposes of names of licensors or
       
   378     authors of the material; or
       
   379 
       
   380     e) Declining to grant rights under trademark law for use of some
       
   381     trade names, trademarks, or service marks; or
       
   382 
       
   383     f) Requiring indemnification of licensors and authors of that
       
   384     material by anyone who conveys the material (or modified versions of
       
   385     it) with contractual assumptions of liability to the recipient, for
       
   386     any liability that these contractual assumptions directly impose on
       
   387     those licensors and authors.
       
   388 
       
   389   All other non-permissive additional terms are considered "further
       
   390 restrictions" within the meaning of section 10.  If the Program as you
       
   391 received it, or any part of it, contains a notice stating that it is
       
   392 governed by this License along with a term that is a further
       
   393 restriction, you may remove that term.  If a license document contains
       
   394 a further restriction but permits relicensing or conveying under this
       
   395 License, you may add to a covered work material governed by the terms
       
   396 of that license document, provided that the further restriction does
       
   397 not survive such relicensing or conveying.
       
   398 
       
   399   If you add terms to a covered work in accord with this section, you
       
   400 must place, in the relevant source files, a statement of the
       
   401 additional terms that apply to those files, or a notice indicating
       
   402 where to find the applicable terms.
       
   403 
       
   404   Additional terms, permissive or non-permissive, may be stated in the
       
   405 form of a separately written license, or stated as exceptions;
       
   406 the above requirements apply either way.
       
   407 
       
   408   8. Termination.
       
   409 
       
   410   You may not propagate or modify a covered work except as expressly
       
   411 provided under this License.  Any attempt otherwise to propagate or
       
   412 modify it is void, and will automatically terminate your rights under
       
   413 this License (including any patent licenses granted under the third
       
   414 paragraph of section 11).
       
   415 
       
   416   However, if you cease all violation of this License, then your
       
   417 license from a particular copyright holder is reinstated (a)
       
   418 provisionally, unless and until the copyright holder explicitly and
       
   419 finally terminates your license, and (b) permanently, if the copyright
       
   420 holder fails to notify you of the violation by some reasonable means
       
   421 prior to 60 days after the cessation.
       
   422 
       
   423   Moreover, your license from a particular copyright holder is
       
   424 reinstated permanently if the copyright holder notifies you of the
       
   425 violation by some reasonable means, this is the first time you have
       
   426 received notice of violation of this License (for any work) from that
       
   427 copyright holder, and you cure the violation prior to 30 days after
       
   428 your receipt of the notice.
       
   429 
       
   430   Termination of your rights under this section does not terminate the
       
   431 licenses of parties who have received copies or rights from you under
       
   432 this License.  If your rights have been terminated and not permanently
       
   433 reinstated, you do not qualify to receive new licenses for the same
       
   434 material under section 10.
       
   435 
       
   436   9. Acceptance Not Required for Having Copies.
       
   437 
       
   438   You are not required to accept this License in order to receive or
       
   439 run a copy of the Program.  Ancillary propagation of a covered work
       
   440 occurring solely as a consequence of using peer-to-peer transmission
       
   441 to receive a copy likewise does not require acceptance.  However,
       
   442 nothing other than this License grants you permission to propagate or
       
   443 modify any covered work.  These actions infringe copyright if you do
       
   444 not accept this License.  Therefore, by modifying or propagating a
       
   445 covered work, you indicate your acceptance of this License to do so.
       
   446 
       
   447   10. Automatic Licensing of Downstream Recipients.
       
   448 
       
   449   Each time you convey a covered work, the recipient automatically
       
   450 receives a license from the original licensors, to run, modify and
       
   451 propagate that work, subject to this License.  You are not responsible
       
   452 for enforcing compliance by third parties with this License.
       
   453 
       
   454   An "entity transaction" is a transaction transferring control of an
       
   455 organization, or substantially all assets of one, or subdividing an
       
   456 organization, or merging organizations.  If propagation of a covered
       
   457 work results from an entity transaction, each party to that
       
   458 transaction who receives a copy of the work also receives whatever
       
   459 licenses to the work the party's predecessor in interest had or could
       
   460 give under the previous paragraph, plus a right to possession of the
       
   461 Corresponding Source of the work from the predecessor in interest, if
       
   462 the predecessor has it or can get it with reasonable efforts.
       
   463 
       
   464   You may not impose any further restrictions on the exercise of the
       
   465 rights granted or affirmed under this License.  For example, you may
       
   466 not impose a license fee, royalty, or other charge for exercise of
       
   467 rights granted under this License, and you may not initiate litigation
       
   468 (including a cross-claim or counterclaim in a lawsuit) alleging that
       
   469 any patent claim is infringed by making, using, selling, offering for
       
   470 sale, or importing the Program or any portion of it.
       
   471 
       
   472   11. Patents.
       
   473 
       
   474   A "contributor" is a copyright holder who authorizes use under this
       
   475 License of the Program or a work on which the Program is based.  The
       
   476 work thus licensed is called the contributor's "contributor version".
       
   477 
       
   478   A contributor's "essential patent claims" are all patent claims
       
   479 owned or controlled by the contributor, whether already acquired or
       
   480 hereafter acquired, that would be infringed by some manner, permitted
       
   481 by this License, of making, using, or selling its contributor version,
       
   482 but do not include claims that would be infringed only as a
       
   483 consequence of further modification of the contributor version.  For
       
   484 purposes of this definition, "control" includes the right to grant
       
   485 patent sublicenses in a manner consistent with the requirements of
       
   486 this License.
       
   487 
       
   488   Each contributor grants you a non-exclusive, worldwide, royalty-free
       
   489 patent license under the contributor's essential patent claims, to
       
   490 make, use, sell, offer for sale, import and otherwise run, modify and
       
   491 propagate the contents of its contributor version.
       
   492 
       
   493   In the following three paragraphs, a "patent license" is any express
       
   494 agreement or commitment, however denominated, not to enforce a patent
       
   495 (such as an express permission to practice a patent or covenant not to
       
   496 sue for patent infringement).  To "grant" such a patent license to a
       
   497 party means to make such an agreement or commitment not to enforce a
       
   498 patent against the party.
       
   499 
       
   500   If you convey a covered work, knowingly relying on a patent license,
       
   501 and the Corresponding Source of the work is not available for anyone
       
   502 to copy, free of charge and under the terms of this License, through a
       
   503 publicly available network server or other readily accessible means,
       
   504 then you must either (1) cause the Corresponding Source to be so
       
   505 available, or (2) arrange to deprive yourself of the benefit of the
       
   506 patent license for this particular work, or (3) arrange, in a manner
       
   507 consistent with the requirements of this License, to extend the patent
       
   508 license to downstream recipients.  "Knowingly relying" means you have
       
   509 actual knowledge that, but for the patent license, your conveying the
       
   510 covered work in a country, or your recipient's use of the covered work
       
   511 in a country, would infringe one or more identifiable patents in that
       
   512 country that you have reason to believe are valid.
       
   513 
       
   514   If, pursuant to or in connection with a single transaction or
       
   515 arrangement, you convey, or propagate by procuring conveyance of, a
       
   516 covered work, and grant a patent license to some of the parties
       
   517 receiving the covered work authorizing them to use, propagate, modify
       
   518 or convey a specific copy of the covered work, then the patent license
       
   519 you grant is automatically extended to all recipients of the covered
       
   520 work and works based on it.
       
   521 
       
   522   A patent license is "discriminatory" if it does not include within
       
   523 the scope of its coverage, prohibits the exercise of, or is
       
   524 conditioned on the non-exercise of one or more of the rights that are
       
   525 specifically granted under this License.  You may not convey a covered
       
   526 work if you are a party to an arrangement with a third party that is
       
   527 in the business of distributing software, under which you make payment
       
   528 to the third party based on the extent of your activity of conveying
       
   529 the work, and under which the third party grants, to any of the
       
   530 parties who would receive the covered work from you, a discriminatory
       
   531 patent license (a) in connection with copies of the covered work
       
   532 conveyed by you (or copies made from those copies), or (b) primarily
       
   533 for and in connection with specific products or compilations that
       
   534 contain the covered work, unless you entered into that arrangement,
       
   535 or that patent license was granted, prior to 28 March 2007.
       
   536 
       
   537   Nothing in this License shall be construed as excluding or limiting
       
   538 any implied license or other defenses to infringement that may
       
   539 otherwise be available to you under applicable patent law.
       
   540 
       
   541   12. No Surrender of Others' Freedom.
       
   542 
       
   543   If conditions are imposed on you (whether by court order, agreement or
       
   544 otherwise) that contradict the conditions of this License, they do not
       
   545 excuse you from the conditions of this License.  If you cannot convey a
       
   546 covered work so as to satisfy simultaneously your obligations under this
       
   547 License and any other pertinent obligations, then as a consequence you may
       
   548 not convey it at all.  For example, if you agree to terms that obligate you
       
   549 to collect a royalty for further conveying from those to whom you convey
       
   550 the Program, the only way you could satisfy both those terms and this
       
   551 License would be to refrain entirely from conveying the Program.
       
   552 
       
   553   13. Use with the GNU Affero General Public License.
       
   554 
       
   555   Notwithstanding any other provision of this License, you have
       
   556 permission to link or combine any covered work with a work licensed
       
   557 under version 3 of the GNU Affero General Public License into a single
       
   558 combined work, and to convey the resulting work.  The terms of this
       
   559 License will continue to apply to the part which is the covered work,
       
   560 but the special requirements of the GNU Affero General Public License,
       
   561 section 13, concerning interaction through a network will apply to the
       
   562 combination as such.
       
   563 
       
   564   14. Revised Versions of this License.
       
   565 
       
   566   The Free Software Foundation may publish revised and/or new versions of
       
   567 the GNU General Public License from time to time.  Such new versions will
       
   568 be similar in spirit to the present version, but may differ in detail to
       
   569 address new problems or concerns.
       
   570 
       
   571   Each version is given a distinguishing version number.  If the
       
   572 Program specifies that a certain numbered version of the GNU General
       
   573 Public License "or any later version" applies to it, you have the
       
   574 option of following the terms and conditions either of that numbered
       
   575 version or of any later version published by the Free Software
       
   576 Foundation.  If the Program does not specify a version number of the
       
   577 GNU General Public License, you may choose any version ever published
       
   578 by the Free Software Foundation.
       
   579 
       
   580   If the Program specifies that a proxy can decide which future
       
   581 versions of the GNU General Public License can be used, that proxy's
       
   582 public statement of acceptance of a version permanently authorizes you
       
   583 to choose that version for the Program.
       
   584 
       
   585   Later license versions may give you additional or different
       
   586 permissions.  However, no additional obligations are imposed on any
       
   587 author or copyright holder as a result of your choosing to follow a
       
   588 later version.
       
   589 
       
   590   15. Disclaimer of Warranty.
       
   591 
       
   592   THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
       
   593 APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
       
   594 HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
       
   595 OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
       
   596 THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
       
   597 PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
       
   598 IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
       
   599 ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
       
   600 
       
   601   16. Limitation of Liability.
       
   602 
       
   603   IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
       
   604 WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
       
   605 THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
       
   606 GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
       
   607 USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
       
   608 DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
       
   609 PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
       
   610 EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
       
   611 SUCH DAMAGES.
       
   612 
       
   613   17. Interpretation of Sections 15 and 16.
       
   614 
       
   615   If the disclaimer of warranty and limitation of liability provided
       
   616 above cannot be given local legal effect according to their terms,
       
   617 reviewing courts shall apply local law that most closely approximates
       
   618 an absolute waiver of all civil liability in connection with the
       
   619 Program, unless a warranty or assumption of liability accompanies a
       
   620 copy of the Program in return for a fee.
       
   621 
       
   622                      END OF TERMS AND CONDITIONS
       
   623 
       
   624             How to Apply These Terms to Your New Programs
       
   625 
       
   626   If you develop a new program, and you want it to be of the greatest
       
   627 possible use to the public, the best way to achieve this is to make it
       
   628 free software which everyone can redistribute and change under these terms.
       
   629 
       
   630   To do so, attach the following notices to the program.  It is safest
       
   631 to attach them to the start of each source file to most effectively
       
   632 state the exclusion of warranty; and each file should have at least
       
   633 the "copyright" line and a pointer to where the full notice is found.
       
   634 
       
   635     <one line to give the program's name and a brief idea of what it does.>
       
   636     Copyright (C) <year>  <name of author>
       
   637 
       
   638     This program is free software: you can redistribute it and/or modify
       
   639     it under the terms of the GNU General Public License as published by
       
   640     the Free Software Foundation, either version 3 of the License, or
       
   641     (at your option) any later version.
       
   642 
       
   643     This program is distributed in the hope that it will be useful,
       
   644     but WITHOUT ANY WARRANTY; without even the implied warranty of
       
   645     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
       
   646     GNU General Public License for more details.
       
   647 
       
   648     You should have received a copy of the GNU General Public License
       
   649     along with this program.  If not, see <http://www.gnu.org/licenses/>.
       
   650 
       
   651 Also add information on how to contact you by electronic and paper mail.
       
   652 
       
   653   If the program does terminal interaction, make it output a short
       
   654 notice like this when it starts in an interactive mode:
       
   655 
       
   656     <program>  Copyright (C) <year>  <name of author>
       
   657     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
       
   658     This is free software, and you are welcome to redistribute it
       
   659     under certain conditions; type `show c' for details.
       
   660 
       
   661 The hypothetical commands `show w' and `show c' should show the appropriate
       
   662 parts of the General Public License.  Of course, your program's commands
       
   663 might be different; for a GUI interface, you would use an "about box".
       
   664 
       
   665   You should also get your employer (if you work as a programmer) or school,
       
   666 if any, to sign a "copyright disclaimer" for the program, if necessary.
       
   667 For more information on this, and how to apply and follow the GNU GPL, see
       
   668 <http://www.gnu.org/licenses/>.
       
   669 
       
   670   The GNU General Public License does not permit incorporating your program
       
   671 into proprietary programs.  If your program is a subroutine library, you
       
   672 may consider it more useful to permit linking proprietary applications with
       
   673 the library.  If this is what you want to do, use the GNU Lesser General
       
   674 Public License instead of this License.  But first, please read
       
   675 <http://www.gnu.org/philosophy/why-not-lgpl.html>.
       
   676