[RR-11] Adding controller for login page, hide the admin menu at this page.
[RR-11] Adding directions for menu.
[RR-11] Adding controllers for admin pages.
[RR-11] adding login service, displaying error message on wrong username/password
[RR-11] modifying state url-s.
[RR-11] Adding Oauth2 methods, for save and send token in header.
[RR-11] Displaying admin menu for logged in users.
[RR-11] Redirect not logged in users to login page.
Merge pull request #18 from HoldInArms/feature-admin-login

Feature admin login