[zanata/zanata-client] 9b8bc1: chore: use Docker builds for Travis, with caching

[GitHub]

  Branch: refs/heads/travis-docker-cache
  Home:   https://github.com/zanata/zanata-client
  Commit: 9b8bc16f60cbeb9b1c5504dc422dcfa9f20092c5
      https://github.com/zanata/zanata-client/commit/9b8bc16f60cbeb9b1c5504dc422dcfa9f20092c5
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2015-08-31 (Mon, 31 Aug 2015)

  Changed paths:
    M .travis.yml

  Log Message:
  -----------
  chore: use Docker builds for Travis, with caching