Merge pull request #737 from pandamicro/develop

Issue #5824: Add ccui.TextField#setString in JSB
Fixed #5797: Added a test for remote image loading
Fixed #5870: Add one parameter support for cc.Texture2D#setTexParameters
Merge branch 'develop' of https://github.com/cocos2d/cocos2d-js into develop
Update html5 engine