Clean up of app icons ; reset to current productive one
Notification icon has to be scalled under Android 4.x
With the API level 11 or greated, the required size is available
Refactoring: icon id as constant class field
Disabled announcements, there are not ready for production
Downgraded Apache commons IO lib from 2.4 to 2.2, 2.4 is not compatible with Froyo