Implemented REST service for Contest Result
Added BallotLineResults and BallotLineResults REST Services

* Added services for returning ballot line result data
* Added database relationships for ballot line results
* refactored mapper code for ballot line and contest results into its own file
Merge branch 'resultsRESTservices' into dev

* resultsRESTservices:
  Added BallotLineResults and BallotLineResults REST Services
  Implemented REST service for Contest Result