Bbp update

- Pulled `sortDirections` base default into Teeble instead of BBP
- Updated BBP to current master (0.9-dev)
- Still has one shim for ajax calls
    - Backbone paginator uses `Backbone.ajax` for all ajax calls. 
    - This works in BB >= 0.9.10, but not in BB 0.9.2. There is an override at the top defined: ```var ajax = Backbone.ajax === undefined ? $.ajax : Backbone.ajax;```