#refs 1
-Added new class user, whom Seeker and Mate extends
-Put usertype, id in session
-clears the session when user comes to log in
-When a user comments, take his id from session and store this id as commenter
-Added new fields in postComment table for Mate and seeker as commenter
-Show the name of the commenters from the post table's comments's commenter
-Went back to the default routes
Merge branch 'userFromSession'