Merge pull request #19 from cocos2d/master

update cocos2d-js
add js breakpoint support
update remove
add runtime
Merge pull request #20 from cocos2d/master

update cocos2d-js
update js prebuilt
Merge branch 'refixruntime' of https://github.com/chuanweizhang2013/cocos2d-js into refixruntime