Various fixes.

-Replaced "enrich-location" with "enrich_location" in akara.conf.
-Added "enrich_location" to enrichment pipeline in all profiles, except nara.
-Updated enrich-subject module to return None if subject is no greater than 2
 characters and fixed regular expression for period-space.
-Updated enrich_location module to remove the state field if it does not contain
 a State name.
-Updated enrich-subject to account for subject being an array of strings, rather
 than lists.