session controller with login
added helper methods for session handling
added professors controller
added view for professor profile
added professor_id to theses
added helpers for session handling
added professor_id
added thesis id and migrated
added test get_students
finished events
Otra vez al master
Merge branch 'ceduquey2'
Con los cambios acorde a lo que hizo fer

Con los cambiso acorde además de quitar errores que habia en los
conflictos
errores en la validación de campos