Initial commit.

Not yet in a particularly interesting state, but the basic
building blocks of with-config and lift-one-node-and-phase
is there.
Don't use sudo when we're using root for admin user.
Factor out some code into pallet-nodelist-helpers.

Lock pallet version to 0.8.0-alpha.7 until we update to new API.

Split up crate into server and guest pieces.
First partial version working for KVM server setup.

Provides enough to set up a given host as a KVM server,
see the README for instructions.
Merge with github version.