Added virtual fields definition/translation - closes #493
It seems the first searcher is not auto-warmed by SOLR (we'll have to work around it)
Solving teething problems - we must warm cache for the first searchers ourselves
the bitset query was not using correct hashcode so every query seemed identical; plus added facet warm up queries
Wrong import == wrong deployment
Added better tests for generating citations from citations/references
Merged with latest master