Added code to play music in the game
Moved shooting to player class and added methods for sounds
Added laser sound effect
Changed volume of background music to be full
Added music to the game as well
Added menu sound effect
Remving music for now
Added some more meny sounds
Moved all filenames into the locals module, and made various other minor
refactorings.

Part of #87
Moved all filenames into the locals module, and made various other minor
refactorings.

Part of #87
Merge branch 'move_filenames_to_local' of https://github.com/nhandler/cs429 into move_filenames_to_local
Fixing bug which caused crates to spawn incorrectly.
Converted 8-space tabs to 4 spaces.
Added background music and added credit in our README
Merge branch 'master' into sounds

Conflicts:
	game/src/gameScreen.py
	game/src/player.py
	game/src/shooter.py
Moved several input-related functions out of gameScreen and into player

Part of #87
Added file paths to our locals file
Merge branch 'master' into player_refactor

Conflicts:
	game/src/gameScreen.py
Fixed my merge mistake
Inventory now stores a copy of player instead of bouncing the inventory
through State.