Modal for registration and login created.
Updates to the views with modals.
Update/Delete of employees removed the tab bar from the main view.
Merge branch 'development'

Conflicts:
	application/models/user.php
	application/views/login.php
	application/views/registration.php
	application/views/settings.php
	application/views/templates/header.php
	application/views/templates/item_table.php