Initial Commit
Working Pong clone and stuff

Also some work to pull parts of the code into reusable bits
for Ludum Dare.
Simple cleanup before compo

Remove all unnecessary things for making the game, such as
old logic/assets/etc. for Pong, or files compiled via Emscripten
which can't be used due to it not supporting SDL2.
Merge branch 'master' of https://github.com/Freezerburn/ld29-engine