Following things have been accomplished:

1. Split pages into partials, using base.html as the parent
2. Added navigation to login, logout, list current todos, home page
3. Added link between todo items and a user
4. Store user_id in local storage to be used when making REST calls to the back end
5. Create new todos using angular
6. List todos using angular
7. Authenticating user
8. How to use sessions
9. Logging user out of session
Merge branch 'v4'