add missing methods in cp.Vect.prototype and cp.v
include chipmunk_private.h for private function access and add active for cp.shape
add missing properties for cp.Shape
Merge pull request #791 from joshuastray/chipmunk

[JSB] add missing api for cp.Vect and cp.Shape
Merge pull request #792 from pandamicro/develop

Fixed #5943: Support local image for cc.loader.loadImg, and improve image loading logic
Fixed #5943: Fix issue about return value of cc.textureCache.addImage
Fix an issue in ParticleSystem test case
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-js into develop