Changes in FragmentEdit

	*Made changes in FragmentEdit to accomodate it for both
	 add and update option
	 -if add_update = 1 -> add option
	 -if add_update = 2 -> update option
	*add is yet not functional
Added onClick event for Edit button
Major changes to reach FragmentEdit

	*Add and Edit button both need to access FragmentEdit
 	 from ManageUser activity through UserDatabase
	*add_update=true/false value differentiaties between add and
	 update
	*In additon, removed Delete button from UserDatabase's
	 activity