Classic overhead run-and-gun game

Current versions

cdogs-sdl requires the following formulae to be installed:
cmake 3.9.4_1 Cross-platform make
pkg-config 0.29.2 Manage compile and link flags for libraries
sdl2 2.0.6 Low-level access to audio, keyboard, mouse, joystick, and graphics
sdl2_image 2.0.1_3 Library for loading images as SDL surfaces and textures
sdl2_mixer 2.0.1_1 Sample multi-channel audio mixer library

Formula history

Mike McQuaid cdogs-sdl: fix rubocop warnings.
Mike McQuaid cdogs-sdl: import from homebrew/games.