- rendering helpers moved to their own file (separate from response helpers)
- create a unified render helper instead of "buffered_render_basic_X" and "buffered_render_tweet_X"
- this helper takes 2 data objects: one with global data (tweet trove, logged in user, etc) and one page-specific
- this lets us remove the disgusting interface type
- modify the User List template to use UserIDs indexing into a global data object instead of a list of Users
- create generic "refresh" button for User Feed that refreshes whichever tab you're on
- refactor TweetDetail view into multiple pieces for easier maintenance
- on "Already liked this tweet" error, save the Like instead of discarding it
