Music Loops now.... and other stuff too

Fixed the music not looping during the level

CHOOSE YOUR CHAPION: Added a character selection. Currently this only swaps out the model, but I'm working on implementing multiple unlockable characters with different weapons/playstyles. (unlockable = unlockable through in game actions, not DLC or any of that BS)

LEVEL SELECT: You can now choose which level you want to play.... of course there's only one at the moment, but more should be coming as soon as I figure out how to make it more intersting.

Enemy spawns have been slightly rebalanced.

KNOWN BUGS:

• Mages have 100% chance to drop the "Black Powder" upgrade, yet first one does not always drop it.