Admin controller, which is not working
Fixed bug, where the app always log into the first user from the database. This is done by passing UID of the real user, who is logging, to UserController.login.
Added a feature to make user moderator and to remove user from moderators. This is done by adding make_moderator/remove_moderator methods in UserController and by adding some links to users/show.html.erb. Deleted add_moderator method from AdminController as not needed. (although I leaved the AdminController class, as needed for Dodo)
Addedd links to episode edition form in all episode views. Added gem rb-readline to gem file so that rails console will work properly on dev environment.