Added amphibians
Finished: index most specific entity in hierarchy

If an item references more than one entity in a hiearchic vocabulary,
choose the most specific entity to index.
Bug fixing on hierarchic searches

Hierarchic search working, issue with root of EOL since list of facet
counts cuts off after some number. This means facet counts for taxa at
the root level are under reported. Need to give user interface clue
about this.