Added locationingest package with POJOs for representing location data
as it goes into the location ingest document, and the
LU_BuildLocationIngest class that uses them to generate that ingest
file.  I overhauled the code that generates the location data that goes
into instance ingest documents.  It now reads the same .csv file as
LU_BuildLocationIngest and generates hashmaps for location code to
library code, shelving string, and collection code, and from collection
code to name, collection code to library code, and from library code to
name.  I added several check for nulls and remove typos from data.  URIs
are now built using the $u or $a subfields of the 856 MARC field,
whichever is populated.