Big Update 1

added bullet, enemy, enemy manager
fix bullet bug

changed getFirstExists() to getFirstDead()
fix bug
Added Leap Motion Controller as one of the game's available inputs
Merge branch 'Son'
remove conflict
fixed bugs
fix conlicts
something
Add effect
Merge branch 'master' of https://github.com/mon124/Leapmotion-Game
something
Add more effects
remove conflict
undefined
add enemy bullet