Implement @jordandukart's metadata viewer functionality.
coding standards
remove extraneous theme calls
Implement derivative framework and some general fixes.
Merge pull request #1 from jordandukart/7.x-derivatives-and-fixes

Implement derivative framework and some general fixes.
clean up filter vs. filtered inconsistencies
Merge pull request #2 from ruebot/7.x-solr-metadata

Implement @jordandukart's metadata viewer functionality.