rm .gitattributes file
Merge branch 'dev'
add alpha support.
修复bug，调用父类onexit方法

修复bug，调用父类onexit方法
update xcode project
modify some api to unrecommend
Merge pull request #15 from moremorefun/add_alpha

add alpha support.
fix demo proj.mac of cocos2d-x 2.x demo
Merge branch 'dev' of github.com:DragonBones/DragonBonesCPP into dev
update proj.mac for 2.x demo
fix typo
Merge pull request #18 from moremorefun/add_alpha

fix typo
DragonBonesNode::buildArmature optimization
fix: cases when remove dragonbones on event
Merge pull request #19 from lite3/dev

DragonBonesNode::buildArmature optimization
fix: repeat play current animation

1.  call gotoAndPlay()
2.  call play()
now, play current animation from frist frame.
Merge pull request #25 from lite3/dev

fix: repeat play current animation
Merge remote-tracking branch 'upstream/master' into dev
Merge remote-tracking branch 'upstream/dev' into dev

* upstream/dev:
  fix: repeat play current animation
  fix: cases when remove dragonbones on event
  DragonBonesNode::buildArmature optimization
  fix typo
  update proj.mac for 2.x demo
  fix demo proj.mac of cocos2d-x 2.x demo
  modify some api to unrecommend
  update xcode project
  修复bug，调用父类onexit方法
  add alpha support.