Cleaned up the mess that was "Minecraft$OS" and "OperatingSystemLookup". Now one nice sexy "OperatingSystem" enum. Everybody happy.
Removed some dead code (SleepForeverThread and HumanoidModel constructors) from com.mojang.minecraft.Minecraft constructor.
Merge branch 'master' of github.com:andrewphorn/ClassiCube-Client
Merge pull request #205 from fragmer/master

Code quality improvement batch #2 (Minecraft$OS refactor, dead code removal)