Merge pull request #3450 from dumganhar/2.1.5-bug-fixes

2.1.5 bug fixes
[2.1.5] Updating tojs/cocos2dx.ini, CCDrawNode::listenBackToForeground doesn't need to be bound.
[2.1.5] [JSB] Fixing a bug that was resolved at v3.0. (http://www.cocos2d-x.org/issues/2315 , Iterating through cc.Node children causes crash.).
[2.1.5] Fixing a bug that was resolved at 3.0(EditBox doesn't show any text in TestJavascript/ExtensionsTest/EditBoxTest, http://www.cocos2d-x.org/issues/2337).