Move manifests for projects developed elsewhere into those repos

justin.palpant.us, tim.palpant.us, and spaceshooter.palpant.us are all "applications" that are built and maintained in other repositories. Their Kubernetes manifests should be maintained there too, and this repository should focus on infrastructure that supports multiple projects.

Previously it was only feasible to maintain all docker-compose files in one repository, because that repository needed to be checked out on the node for deployment. And it's not like anyone else was going to 1) VPN 2) SSH to the node 3) clone/pull/update their repo 4) deploy.

But now, with Kubernetes exposed to the intranet, all that is required is to VPN and to have a kubeconfig file that grants access. Since the VPN is set up, this should be done in conjunction with #16 (closed).