Merge pull request #1 from nyanpasu/master

Pull linux
Uncommited changes
Wrote CMakeLists.txt for building on linux
Changed GetTime/Sleep functions to use SDL_GetTick and SDL_Delay.
Compilable linux fixes.
Switched to OpenGL 3.0, added profiling
Conflicts resolved
cmakelists.txt opengl libs
cmakelists opengl libs
resolved merge conflict
linux gl fixes
linux gl fixes