change to use DragNDropList to do dragging.

Signed-off-by: AndrewXU <zlqxccxuy@gmail.com>
Merge branch 'develop' of github.com:Android-Mobole-Development-Group1-2013/GTD_Android_project into develop
AppSettingDbProxy.java and amend gtdeventfolder list

Signed-off-by: AndrewXU <zlqxccxuy@gmail.com>