audio changes
set up the update method and the jump trigger
cleaning audio code
implemented the shooting sound trigger
Added coin sound and allow playback of different background sounds depending on the active game-state.
Allowed for songs to be looped during each game state.
transition sound added
allows for different levels to play different songs
Some enemy changes, I couldn't figure it out properly and I don't want to waste more of your time...
I used the update method on the enemy class to make enemy move back and forth on the screen.
This version also has all the audio updates except the new loops which I will add by tomorrow.

-Enemies also trigger sounds right now
Merge branch 'master' of https://github.com/murphyslaw480/platformer4x4
merged in the sound effects, no enemy

Conflicts:
	Platformer/Platformer/Control/Overworld.cs
	Platformer/Platformer/Game1.cs
	Platformer/PlatformerContent/PlatformerContent.contentproj
Merge pull request #10 from d-en-wat/master

Audio changes and some enemy.