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'
Made views for watching/unwatching hashtags, updated model to support watching hashtags
made watch hashtag button actually add hashtag to the user's list of watched hashtags
made custom queryset for Posts and gave it a remove_redundant method
added a watched_by filter in PostManager
added a seen_by filter in PostManager to get all posts posted, followed (user) or watched (hashtag) by a given user
Merge pull request #25 from philringsmuth/S51_WatchHashtags

S51 watch hashtags