Merge pull request #21 from rwarbelow/guardian_profile_registration

Guardian profile registration
added before filter methods and helpers files for students and teachers
added teacher profile view
Merge pull request #22 from rwarbelow/add_before_filters

added before filter methods and helpers files for students and teachers
Merge pull request #23 from rwarbelow/create_views

added teacher profile view
cleaned up session, teahers, user_identities profile