• makefile.pl modified to be compatible with Darwin and
  to error out if XCode ( gcc specifically ) is not installed
  
• makefile.pl modified to support Perl 5.6+ on Win32 MSVC
  ( previously only Perl 5.8 was supported )
  
• parser.c modified to include stdlib.h for malloc in Darwin.
  
• Cyclic equality test weakened to allow for differences in
  default sorting of hash keys per perl version.