Login refactoring & new voting layout

- Moved control panel under separate layoutController
- Renamed authController to loginController
- Incapsulated cookie handling into authService
- Refactored promise chains to properly handle request states
- Fixed minor bug with flashing artefact of input form on auth code acception
- Fixed API to return proper error codes
- Migrate from $cookies to more appropriate $cookieStore
- Changed voter layout
- Parse url parameter via native angular method
I just left it in place because it was there. Not sure if it is required. Can bind it to devMode, but generally we seem to need a more elaborate logging approach