Can view and add contacts
Now correctly handles duplicate contacts.
Can now remove contacts and view contact list with IP addresses showing.
This now prompts the user if they want to install PiMessage.
Fixed a bug for removing/overwriting contacts.
Cleaned up code from changes. Adding/removing is done neatly in functions.
Merge branch 'contacts' into CLI
Merge branch 'contacts' into messages
Merge branch 'CLI' into messages