Implement reset password feature

* View page for the forgot password link

* Improve feedback messages when a user is unable to login

* Change the "username or email" prompt on the login page
to only prompt for the email address. However, users can still
login with their usernames

* Added missing profile view in the admin section
Merge branch 'mapascoletivos' of github.com:mapasColetivos/Ushahidi_Web into signup-dev

Conflicts:
	application/controllers/users.php
	application/models/user.php
	themes/mapascoletivos/css/mapascoletivos.css