added CQL map for rec.collectionIdentifier Index

Can be used to search for the collection-level Record that a component
derived from
fixed missing import in clear.py
added Index for parent (collection) title
fixed up parentid index CQL map
added CQL map for rec.collectionName Index
added title in link to parent for component results
replaced folder image GIFs with PNGs
moved bolding of result titles from CSS to templates
added hierarchy to component summary