clic.db.lookup: Translate forms of region class

clic.db.lookup.API_SUBSETS = {'all': 'chapter.text', 'longsus': 'quote.suspension.long', 'nonquote': 'quote.nonquote', 'quote': 'quote.quote', 'shortsus': 'quote.suspension.short'}

Translate public API subset names back to regions

clic.db.lookup.api_subset_lookup(cur)

Return a lookup of API subset names -> rclass_id

clic.db.lookup.rclass_id_lookup(cur)

Return a lookup of rclass name -> rclass_id