added custom User model with followed users
added views for following/unfollowing users
added single user profile view, which uses adapted users template
added url for user profile
made username a link to user profile
added follow button on user profile
made user follow button work, removed from self so you can't follow yourself
made home view display posts by followed users (and yourself)
changed search term span to bold in post search results
Merge pull request #23 from philringsmuth/S50_FollowUsers

S50 follow users