updated sound effects
added headshot and flapping sfx
added sfx to boss on lvl 3
Merge remote-tracking branch 'origin/master' into SoundEffects

Conflicts:
	Platformer/Engine.js
	Platformer/Type1Enemy.js
	Platformer/Type2Enemy.js
updated credits and sfx
added barrier sfx to lvls 2-5
trying to sync
Added intro music
Merge remote-tracking branch 'origin/master' into SoundEffects
fixed game over music
lvl3 boss fix sfx
Merge remote-tracking branch 'origin/master' into SoundEffects
hot fix on lvl3 boss sfx
Merge branch 'master' of https://github.com/ThaddeusT/Platformer