Added setAuth proxy method
Added setAuth proxy method

farhan4648gul/Goutte,2upmedia/Goutte,FriendsOfPHP/Goutte,ferjflores/Goutte,viniciusferreira/Goutte,zamok2971/GoutteWithMultiCurl,sitesense/Goutte,chrismoulton/Goutte,jozhao/Goutte,zamok2971/GoutteWithMultiCurl,stof/Goutte,moffe42/Goutte,zamok2971/GoutteWithMultiCurl,trustable/Goutte,thewilkybarkid/Goutte,georaldc/Goutte