change power_driver from Virsh to virsh

Chris updated his nova patch, so we need to change localrc to match.
Move old quantum notes out of scripts/demo

The process for getting quantum-baremetal working has been incorporated
into the various projects, and no longer requires manual work.

As such, the manual instructions are no longer printed at the end of
running "demo", but I have saved them in quantum_notes.md for reference.