Release flocker 0.1.4 - 829

Ready for testing:
 * Docs: http://docs.clusterhq.com/en/0.1.4/
 * Tutorial Base Image: https://vagrantcloud.com/clusterhq/boxes/flocker-tutorial/versions/2

(Remember to remove any manually added vagrant base images using `vagrant box list` and `vagrant box remove`)

Fixes #829