clicking on a polygon displays the district, removing some extraneous stuff
use district name rather than the name of the JSON file when referencing districts
closing issues #9 and #10

- clicking on map should show district name
- feedback should show district on address search
refactoring district_contains_point to use the reject function rather than the hack i had in place earlier
handle case where user clicks outside of a region
fixing a regression in address lookup
fixing a regression in address lookup
taking out console.log...
Merged #13