Update nokogiri to version 1.6.7.1
Update nokogiri to version 1.6.7.1

jasnow/adopt-a-hydrant,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,CostantinB/adopt-a-hydrant,friendlycode/adopt-a-hydrant,jasnow/adopt-a-hydrant,friendlycode/adopt-a-hydrant,jasnow/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,friendlycode/adopt-a-hydrant,codeforamerica/adopt-a-hydrant