travis: PHP 7.0 nightly added
travis: PHP 7.0 nightly added

moffe42/Goutte,sitesense/Goutte,farhan4648gul/Goutte,georaldc/Goutte,FriendsOfPHP/Goutte,ferjflores/Goutte,viniciusferreira/Goutte,chrismoulton/Goutte,jozhao/Goutte,2upmedia/Goutte