+ Xcode generated files to Git ignore list
+ SDL static library, universal i386/x64, from https://hg.libsdl.org/SDL at 22a7f096bb9d
+ SDL_mixer static library, universal i386/x64, from https://hg.libsdl.org/SDL_mixer at a4e9c53d9c30
+ SDL_net static library, universal i386/x64, from https://hg.libsdl.org/SDL_net at 6df2a7a9bb59
+ Xcode project, compiles but fails to link because of SDL_mixer dependencies