add ParticleManager and remove unused classes.
Merge pull request #110 from RaoZiJian/master

Add choose role music effect
Merge branch 'master' of github.com:fusijie/FantasyWarrior3D

Conflicts:
	src/GlobalVariables.lua
moved all property to global
Merge branch 'master' of https://github.com/fusijie/FantasyWarrior3D

Conflicts:
	src/ActorTestScene.lua
	src/GlobalVariables.lua
	src/actors/Actor.lua
	src/actors/Archer.lua
	src/actors/Dragon.lua
	src/actors/Knight.lua
	src/actors/Mage.lua
	src/actors/Piglet.lua
	src/actors/Rat.lua
	src/actors/Slime.lua
Merge pull request #111 from Wu-Hao/master

refactored Actors
Better AI
Merge pull request #112 from Wu-Hao/master

Better AI