replaced the user and creator records

Replaced the user and creator nested objects with a string that combines the username and zone into a single string of the form username#zone.  This will simplify filtering search results by ACL.
project version is now 0.2.0.
Fixed typos
CORE-5104 Added path to the indexed fields
attributes and units are indexed differently

attributes are indexed as irods_entities and units are indexed as keywords.
ids are no longer analyzed
CORE-5116 attributes are no longer tokenized

attributes use the custom irod_entity analyzer.
CORE-5116 irods_entity analysis made exact

It no longer lowercases the tokens, nor converts to ASCII.
Merge branch 'master' into dev