Adds distance functionality and styles

Styles distance number by moving it to the upper-right of the results
list items and adds a box showing distance over search radius.
Merge branch 'master' into viz-distance
Merge branch 'master' into viz-distance
Merge branch 'master' into viz-distance
Styled distance bars

Styled distance bars to make darker bars further away and lighter bars
nearer to the user's entered search location.
Merge pull request #77 from codeforamerica/viz-distance

Viz distance