Introduces Airship in pod. This includes:
* A base image which sets up common requirements
* An image for the libvirt service
* An image for building a specified instance of airshipctl
* An image for initializing the various libvirt infrastructure required
for a deployment
* An image which runs the deployment scripts
Closes: #313
Change-Id: Ib1114350190b0fe0c0761ff67b38b3eca783161a
a423607000