[Checkins] [zopefoundation/zope.testrunner] ba2883: Faster Travis CI builds

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zopefoundation/zope.testrunner
  Commit: ba28833f8f7f15364a57fbe1ab60cd25611c5f1c
      https://github.com/zopefoundation/zope.testrunner/commit/ba28833f8f7f15364a57fbe1ab60cd25611c5f1c
  Author: Marius Gedminas <marius at gedmin.as>
  Date:   2014-12-18 (Thu, 18 Dec 2014)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  Faster Travis CI builds

See http://docs.travis-ci.com/user/workers/container-based-infrastructure/