HHCOC-5 Advanced search functionality added to hull history centre.  Redirection of "catalog" route to the CatalogueController due to some hardcoding of "catalog_path" within advanced search functionality.  solrconfig.xml modified.
Removed the format_ssi field from sub-collection, series, sub-series so that they are not visible in the facets. Updated items sidebar partial.
- Language facet removed
- Language added to the ArchiveRecord class, it will look for localised language declarations (not the collection level one).  Display in Items and pieces.