1、MyLog's member isDebug is changed to "public static". You can set value anywhere.
2、StringHelper add two function. isEmpty() and convertToInt().
3、The getErrorBaseInfo function of BaseInfo has been changed;
4、tetConnectTimeOut() function has been changed to getConnectTimeOut() in HttpLoader.
5、addPostParams() function has been changed in HttpAsyncTask.
6、getRoundedCornerBitmap（） function has been changed in BitmapHelper.