Port preflow push max flow alg. from svn -r3516 (#176)
Namely,
- port the files
- apply the migrate script
- apply the unify script
- break the long lines in lemon/preflow.h
- convert the .dim test file to .lgf
- fix compilation problems
1 INCLUDE(FindPackageHandleStandardArgs)
3 FIND_PROGRAM(GHOSTSCRIPT_EXECUTABLE
5 PATHS "$ENV{ProgramFiles}/gs"
6 PATH_SUFFIXES gs8.61/bin gs8.62/bin
7 DOC "Ghostscript: PostScript and PDF language interpreter and previewer."
10 FIND_PACKAGE_HANDLE_STANDARD_ARGS(Ghostscript DEFAULT_MSG GHOSTSCRIPT_EXECUTABLE)