Solrize type in DC datastream.
Remove desc_metadata dependent facets and replace them with facets that we want, sans the creator one.  Which I have to figure out.
Add an aggregate creator_sim field that captures personal, corporate, and unscoped names in the mods record.
Add creator_sim to facet list.
Clean up significant controller to implement the buckets we actually want.  Leave in some extraneous routes so the home page doesn't blow up.
EVERYTHING WORKS
Special queries now have unique facet field selections passed in, default behavior with no local setting :facet_list preserved.
Remove junk puts
Add stub of controller spec.
Adds basic test for our significant content routes.  Fixes some bugs found while writing the tests.
Hoepfully a fix for sjb's nil error
DRY out catalog_controller, add actions for presentations and learning objects.
Add other best bit queries with new routes to routes file, remove unneeded significant_content_controller.
Add remaining type/learning object specific facets.
Remove unneeded clone of the catalog index view.
Merge pull request #206 from nu-lts/feature/new_facets

Feature/new facets
Fix for metadata_assignment_spec
Fixes wrong depositor value in owned_by_bill
Slowly getting there
Fixes paranoid_rights_datastream_spec