翻译api： CCActionGrid.h 和CCActionGrid3D.h
api翻译： pysicsbody.h
补充ccgridaction.h和ccgridaction3d.h原有@brief 等关键字后面没有翻译的部分。
完成physicsbody api翻译补充
CCPhysicsContact.h翻译
cocos2d-x 翻译ccphysicsjoint
更新api翻译更新，ccphyscisworld,ccpphysicsshape
改正原有的翻译
Merge pull request #42 from Yangtb/v3

translate Menu
translate cocos/ui/UIButton.h
fix some translational bugs
translate cocos/ui/UICheckBox.h
Merge pull request #43 from herokingsley/v3

翻译改正
translate cocos/ui/UIHBox.h
Merge pull request #46 from Pusri/v3

translate cocos/ui/UIButton.h&UICheckBox.h&UIHBox.h
翻译API:MathUtil.h
Merge branch 'v3' of https://github.com/GCZeng/cocos2d-x into v3
翻译API:MathUtil.h
Merge pull request #48 from GCZeng/v3

翻译API:MathUtil.h