Import GhostDriver v1.0.4

Issues in this release: https://github.com/detro/ghostdriver/issues?labels=1.0.4&state=closed
See GhostDriver [Changelog](https://github.com/detro/ghostdriver/blob/master/CHANGELOG.md) for more details.
Also, releases page: https://github.com/detro/ghostdriver/releases/tag/1.0.4