Changes in fragment of DeleteUser activity
Spinner in FragmentDelete populated with users
Delete button pressed now pops up an alert

	AlertFragment has got a function wherein you can
	pass your own preference of title and messages
	for alert dialog box
Changed way of implementing delete alert
Delete button is now functional

	* Alert has been implemented in FragmentDelete itself
	* DialogAlert fragment is not used for the time being
Major changes made in interface of add and edit

	* Add and Update now open up to dialogboxes instead
	  of fragment for entering username and password
	* DialogAlert implements it and is called from UserDatabase
	* FragmentEdit is useless for now
Show password checkbox now functional in dialog box
Empty username will not be saved
Merge branch 'varun' into tanjot
Login password not available

	Made a check at login if password is not available
Moved UserStructure out of directory 'ui'
Removed useless files

	Fragments which are not used for
	implementation have been deleted
UserDatabase activity removed

	Add and Update dialog boxes could be directly
	called from ManageUser
	Basically, proceeding towards reducing activities
	and improving user interface
Fixed Bugs and delete implemented in ManageUser

	* Delete dialog box is now called from
          ManageUser
	FIXED:
	* Cancel button from add used to close
	  ManageUser
	* Empty password not accepted
Removed useless delete fragment and activity files

	Delete is now implemented using dialog box
	in Manageuser itself
Moved MainActivity to ui directory
New version v0.5.3
Edit and Del button in main layout
Made del button work in MainActivity instead of ManageUser
LoginService to manage notification that will help login