添加单个文件下载也有进度条功能

添加单个文件下载也有进度条功能
Merge pull request #391 from bigHandYT/develop

添加单个文件下载也有进度条功能
update version
CCLabelBMFont: Crash when there are invalid characters which aren't in fnt file
CCSpriteFrameCache: fix memory leak
upgrade to cocos2d-x 2.2.4
fix compile errors
Merge branch 'upgrade_to_224' into develop
update framework zip and luabinding
update player mac
update docs
fix CCS UILayout crash
fixed bug in function "tolua_beginmodule"
standardizing coding style of some files
Merge pull request #394 from SunLightJuly/tolua_bug_fix

Tolua bug fix
fix CCScriptEventDispatcher crash
fix bug for Layout::getClippingRect()

解决Layout 获取裁剪区域错误的bug
fix CCS support
Merge pull request #397 from bigHandYT/develop

fix bug for Layout::getClippingRect()
fix typo