Update nokogiri dependency to version 1.5.9
Update nokogiri dependency to version 1.5.9

codefornigeria/adopt-a-hydrant,Bryanprz/adopt-a-street,codeforamerica/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,billyfung/van-racks,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,akintoey/adopt-a-hydrant,billyfung/van-racks,codeforboston/adopt-a-hydrant,voyera/adopt-a-hydrant,code4sac/adopt-a-light,eebbesen/adopt-a-tree,jasnow/adopt-a-hydrant,voyera/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,t-pfaff/adopt-a-hydrant,codeforsavannah/adopt-a-garden,friendlycode/adopt-a-hydrant,akintoey/adopt-a-hydrant,eebbesen/adopt-a-tree,0111001101111010/adopt-a-spot-odu,voyera/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,OpenTwinCities/adopt-a-tree,jamiekelly/adopt-a-hydrant,jasnow/adopt-a-hydrant,jasnow/adopt-a-hydrant,eebbesen/adopt-a-tree,codeforsavannah/adopt-a-garden,jamiekelly/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,CostantinB/adopt-a-hydrant,Stackato-Apps/adopt-a-hydrant,codefornigeria/adopt-a-hydrant,billyfung/van-racks,friendlycode/adopt-a-hydrant,jamiekelly/adopt-a-hydrant,codeforboston/adopt-a-hydrant,Bryanprz/adopt-a-street,akintoey/adopt-a-hydrant,HackMichiana/adopt-a-bus-stop,t-pfaff/adopt-a-hydrant,codeforanchorage/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,OpenTwinCities/adopt-a-tree,0111001101111010/adopt-a-spot-odu,HackMichiana/adopt-a-bus-stop,friendlycode/adopt-a-hydrant,codeforamerica/adopt-a-hydrant,baraka101/dar-adopt-a-mtaro,OpenTwinCities/adopt-a-tree,Bryanprz/adopt-a-street,code4sac/adopt-a-light