Greatly extend and improve the test file for adaptors (#67)

- Add concept checks for the alterable, extendable, erasable
and clearable adaptors.
- Add test cases for modifying the underlying graphs through adaptors
whenever it is possible.
- Check the conversions between Node, Arc and Edge types.
- Add more test cases for the adaptor-specific functions and maps:
enable(), disable(), status(), forward(), backward(), CombinedArcMap,
CombinedNodeMap, ResidualCapacity etc.
- Use checkGraphIncEdgeArcLists() to simplify the test cases for
undirected graphs.
- Add test cases that use static graph structure (GridGraph) with
several adaptors combined.
- Add comments for the test cases.

 syntax: glob

 *.obj

 *.orig

 *.rej

 *~

 *.o

 *.log

 *.lo

 *.tar.*

 *.bak

 Makefile.in

 aclocal.m4

 config.h.in

 configure

 Makefile

 config.h

 config.log

 config.status

 libtool

 stamp-h1

 lemon/lemon.pc

 lemon/libemon.la

 lemon/stamp-h2

 doc/Doxyfile

 .dirstamp

 .libs/*

 .deps/*

 demo/*.eps

 syntax: regexp

 (.*/)?\#[^/]*\#$

 (.*/)?\.\#[^/]*$

 ^doc/html/.*

 ^doc/.*\.tag

 ^autom4te.cache/.*

 ^build-aux/.*

 ^objs.*/.*

 ^test/[a-z_]*$

 ^tools/[a-z-_]*$

 ^demo/.*_demo$

 ^build/.*

 ^doc/gen-images/.*

 CMakeFiles

 DartTestfile.txt

 cmake_install.cmake

 CMakeCache.txt