Revert "Revert "Merge pull request #5 from heuripedes/master""

This reverts commit ccc24029b1a18ee1833ba34aa1f813ec726b28cf.
Remove dependency on zlib
Merge pull request #6 from heuripedes/master

Add cheat support
(OSX PPC) Add OSX PPC detection
Add OSX version minor detection in Makefile
Check frontend value for NULL before comparing it
Merge pull request #7 from garbear/fix-null-check

Check frontend value for NULL before comparing it
(Libretro) Fix framebuffer to 240x160 getting rid of weird pixel offset
Merge pull request #13 from libretro/master

(Libretro) Updates