Security configuration

Migrate the security config classes from the raspredelba project, together with the profile configurations.

This project should have STUDENT, PROFESSOR and ADMIN roles. The admin should see /admin/**page, while the professors should see only their own page. There should be a shortcut to page /my which will redirect to /professor/** page. (See how this is done in raspredelba). The students should see only the results for their courses /student/**(this page is yet to be implemented).