message: Use service to start xvfb
diff: @@ -15,11 +15,12 @@ addons:
  packages:
  - libsecret-1-dev
  +services:
  + - xvfb
  +
  before_install:
  - if [ $TRAVIS_OS_NAME == "linux" ]; then
  export CXX="g++-4.9" CC="gcc-4.9" DISPLAY=:99.0;
  - service xvfb start;
  - sleep 3;
  fi
  install:
  