Merge pull request #24 from RedComrade/master

Moved sound_fx and music to master files/global variables
Housekeeping and scripting update

Moved environments into their folders, moved test-tiles into their
folders
Game.Blend update

Levels can now be loaded by script
Press the numbers 1 through 4 while the game is running to open
different levels. Only works properly when they are used in order.