1391932 - Warning: array_multisort() [function.array-multisort]: Argument #1 is expected to be an array

Remove the 'filename_suffix' sarnia image/media field formatter settings, since this is really specific to a particular use case.

refs 10019 -- stash solr properties as entities, so that solr doesn't get queried a second time when running entity_load() if possible.

refs #10019 -- load entities from solr in batches of 50 so that we don't exceed the maximum GET request size.

Set SarniaViewsHandlerField::original_value property by default, since this is sometimes used by views_handler_field::render_text().

refs #9543 -- add null views filters. This commit can be reverted if the patch from http://drupal.org/node/1318904#comment-5817206 is committed to Search API.

refs #9551 -- add search_api random sort patch to the makefile. see http://drupal.org/node/1197538#comment-5878544

Issue #1197538: add 'search_api_random' field; this assumes that a random_* field is configured in whatever Solr schema is being used.