Modified the API Level 11 parts so that it can run at Android 2.3
Add actionbarsherlock to project, but it conflicts on android.support.v4
library
1. modify alterdialog() setbutton
2. modify comment for javadoc
1. add exception doc/
1. Add comment for javadoc
2. Add error code
Merge branch 'dev'

Merge dev to master
1. Delete actionbarsherlock