Title: Follow a user

Primary Actor: Authenticated User

Preconditions: Authenticated User must be in a model page (e.g. http://meshdev.ddns.net/dev/#/model/1) or (if the Visualize Profile user story is complete) in the page of the user they wish to follow (e.g. http://meshdev.ddns.net/dev/#/profile/donatello). The Authenticated User must not already be following the user.

Main Success Scenario:

1. Authenticated User presses the “Follow User” button.
2. The system registers the follower relationship.
3. The button is changed to “Unfollow User”.