Initial implementation for geocoder (with tests).
Merge pull request #3 from emartinez-usgs/geocoder

Initial implementation for geocoder (with tests).
Created Utility class for confidence Calculator
Updated computeFromGeocode, to use mapquest JSON response.
Updated computeFromGeocode, to use mapquest JSON response.
Updated what is passed to confidence calculator.
Some whitespace changes. Handles new input from geocoder. Updated tests.