fixed a bug in FaceToEnemy
support special attack
Merge branch 'master' of https://github.com/fusijie/FantasyWarrior3D

Conflicts:
	src/BattleScene.lua
Merge pull request #20 from calfjohn/master

support special attack
upgrade cocos2d-x to v3.3beta1
Add Battlefield UI blood drop message deliver(by zijian).
Create README.md