First pass at rich keywords

Adds Bootstrap TagsInput plugin for tokenizing in the UI, as well as Typeahead for suggesting keywords. Much smarter /api/entries/keywords path (sorts by popularity, with counts), might go further with Bucket filtering soon. Should also look at making this a custom field. Note: Didn't style the Typeahead yet, as I have some of that in the search branch.
Standardize previous API version at 0.0.4
Update install/seed data
Fixes

* Add Typeahead for keyword frontend
* Add names to Express routes to id them easier
* Re-implement the catchAll option (so installs have a nice error for them).
* Fix for deserializing a user (if a session was found, but user couldn't be looked up)