Get listing show to render basic info without other models.
Build json return object in listing show API to include amenities and unavail. ranges. Render in listing show.
Add api users controller. Add user model and collection to backbone.
Fix major multiple-fetch bug. Get user-avatar fetching working.
Add user show page in backbone. Begin to implement listings index in backbone.
Implement listings index page. Implement automatic re-rendering of list.
Refactor listings list into subview, allowing clicks on filter form to refresh list without disrupting input.
Add non-functional price slider to index.