removed old makefile, use the new one in the sdl_unix branch
Merge pull request #1 from redsaurus/sdl

tiny changes so that the SDL2 stuff works on OSX
merge branch sdl_unix into master
Fixed error in .menu file parsing on Unix
Merge pull request #3 from alexandreblin/sdl_unix

Fixed error in .menu file parsing on Unix
Merge pull request #4 from redsaurus/sdl

Fixed icarus crash on OSX/Linux