Added election administration link to locality document
Implemented service functionality for Localities

* Refactored db.js functions to match coding style
* Added code to retrieve locality information from database and return via service
    * Locality name, id, and type
    * Locality early voting sites
    * Locality precincts
    * Updated database schemas for table relationships
* Added missing self references to
Added code for returning Locality data from the database

* localityService:
  Implemented service functionality for Localities
  Added election administration link to locality document