use guid_prefix for type

[jdeck88]

Create a new field in loader called "type" where we can select database and use the following as a map:

https://docs.google.com/spreadsheets/d/1oCSZ1C5QNyoDeC-eWu13o2Bw49NDKVcJeginpczwCP8/edit?gid=0#gid=0

This will be a keyword field put in Front End

When one selects type, it calls a list of facets particular to each type, make this configurable to easily drop in different facets.