sparklemotion/nokogiri — pull request #947 by eitoball (2013-07-25 11:39:56+00:00)
Title: Add ruby-2.0.0 and allow ruby-head to fail to Travis CI config

It seems that adding ruby-head to `allow_failures` is [recommended)(https://github.com/travis-ci/travis-ci/issues/1195) for now.