added ability to register new user and current user email displays in navbar

[Chewieez]

1. load page and use login form to create a new user via email and password, then click "Register" button
2. check that you have been logged in under this new user and logout button appears in navbar
3. check that login form hides
4. check that the current active user's email is displayed in navbar

[krysmathis]

👍