Notificaton stub code
added notification
testing out preference activity
Started on preferences
using preference fragments to make activity contents
now uses dummy data
Started on adding multiple filters. New class added for filters and they
are stored in array.
New stub method created for retrieving array of filters
Added action bar
few modifications in prefs
Now no need to create USSDFilterString.conf manually. the preference
interface does it using UI
Merged branch - development and resolved conflicts