v5.5.2

Bug fixes

#953 Fix another regression in FacetPaginator to allow the paginator to work with multiple pages
#951 Allow #back_to_search helper to work when no search is available
#944 Allow :route_set option for #render_constraints_query
#920 Hide view types if there are no results

Updates and other improvements

#950 Update to rspec3
#949 Test Blacklight against Solr 4.9
#947 Test Blacklight against the latest versions of Rails 3.2, 4.0, and 4.1
#945 Use Rails APIs to discover appropriate document type partials