Feature #4977: Use single thread download in 3.0beta
Merge pull request #44 from pandamicro/v3_assets_manager

Feature #4977: Use single thread download in 3.0beta
Feature #4977: Make AssetsManager::batchDownload protected
Merge pull request #45 from pandamicro/v3_assets_manager

Feature #4977: Make AssetsManager::batchDownload protected
Merge branch 'v3_assets_manager' of git://github.com/cocos2d-html5/cocos2d-x into v3_assets_manager
add widgetreader in local includes