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
made reply button not show up for users you are not following
made reply button show up for my own posts
added backend check to make sure you can't reply to a post unless you are following the author
fixed so that user must be a participant in the conversation (or follow the author, already implemented) in order to reply to a given post
Merge pull request #24 from philringsmuth/FIX_MustFollowToReply

Fix must follow to reply
changed hashtag regex to be better ;]
passed hashtag regex as a parameter to post templates
parse hashtags into search links on posts
added powertip on hashtag links w/ watch button (doesn't work yet)
changed powertip to say 'watch #hashtag'