Show the name of the user currently signed in next to the menu.
Add tests for displaying user name.
Merge branch 'feature/showSignedInUserNameInMenu-110' into prototype

Conflicts:
	app/views/layouts/_navigation.html.haml
Sign in the user on initialization if token is present.
Disable server-side session checks until we have working sessions on the server.

For now, the client will check for an authentication token and update the DOM accordingly.