Add api documentation about return values of SolrHelper methods
Deprecation SolrHelper#get_single_doc_via_search
Deprecate SolrHelper#get_facet_pagination
Merge pull request #859 from projectblacklight/deprecate_get_facet_pagination

Deprecate SolrHelper#get_facet_pagination
Merge pull request #857 from projectblacklight/deprecate_single_doc

Deprecation SolrHelper#get_single_doc_via_search
Merge pull request #856 from projectblacklight/doc_solr_helper

Add api documentation about return values of SolrHelper methods
update travis to test against rails 4.1.0.rc2
add SolrResponse#documents to translate solr response documents to a blacklight::solr::document model
Extract SolrDocument references from controllers and models and define
the solr document class to use in the blacklight configuration.

- add blacklight_config.solr_document_model configuration (defaults to
  SolrDocument)
- make Bookmarks polymorphic and refactor Bookmarks to use objects
  instead of passing IDs around
Merge pull request #860 from projectblacklight/rails41rc2

update travis to test against rails 4.1.0.rc2
Merge pull request #855 from projectblacklight/solr-document-class

Extract explicit SolrDocument class references to make the model class configurable
Move force_to_utf8 from SolrHelper to SolrResponse