In house sound engine, first music track.

I made a new py file, sound.py and added a new json file to every level, dat.json. In the future I will probably combine dat and entities into one file, but right now, everything is so sensitive and fatal errors happen all the time when I try to add new stuff. But, in dat.json, you can specify the song that loops in every individual level along with some other info on starting and stopping sounds. So, game makes lots of pings to sound, and music can now be played in levels. I have made a song and intgrated into the two red alert levels, it is a simple 8 bit riff, but the music will get better as I learn how to use programs like FL Studio better.