Bumped to 4.99.28
makefile for the cygwin environment
Cleared some errorneous code
cascading style sheet validates.
fixed all warnings.
Cleared some of RB_MSVC defines (MSVC support dropped)
described "-mno-cygwin" switch
changed standard from c99 to gnu99.
removed warnings about unused variables.
more documentation added -W to the mingw version.