Added facets view and template
only load if the query has changed or 0 results
Removed FacetView
Simple facets template
Attempt to get more results if we only have 1

This could be from a user loading a single POI and pressing "back"
Simple renderFacets method

This seems more flexible and less error prone than having another
itemList style just for the facets. Especially for tracking clicks on
each facet.
Removed unused imports / code
Facets is no longer a Backbone.Collection