Newspapers search form

[ebenenglish]

This PR addresses #86, and includes:

• A newspapers search interface, at /newspapers_search
• Installer installs BlacklightAdvancedSearch (to facilitate newspaper search features)
• Updates to indexing, so that place of publication and language metadata values from NewspaperTitle and NewspaperIssue objects are copied to NewspaperPage Solr records
• Minor style updates to NewspaperTitle show view (search within title)
• Remove redundant config/locales/hyrax.en.yml (which was a copied wholesale from Hyrax) and replace with config/locales/newspaper_works.en.yml.
• Remove redundant rake tasks that had been copied from Hyrax
• Feature specs for testing front-end interaction with newspapers_search, NewspaperTitle search, and view all front pages

TO TEST THIS BRANCH:

• Remove any existing .internal_test_app and re-run the installer.
• Create a set of test objects in the console similar to those in spec/features_shared.rb
• Start the app and go to /newspapers_search to test.

[brianmcbride]

The newspapers_search form is working as expected. I was able to successfully search newspapers based on date ranges and the first page function is working as expected. Also, the search form adjusts when newspapers with different languages are added to the collection.

All rake tasks passed.