implemented ranged collider, added more feature to attackmanager
add feature to attackcommand
Merge branch 'master' of https://github.com/fusijie/FantasyWarrior3D

Conflicts:
	src/Actor.lua
	src/AttackCommand.lua
	src/Mage.lua
Merge pull request #50 from Wu-Hao/master

implemented ranged collider, added more feature to attackmanager