KVM and OpenStack integration

[Michael Hope]

Hi Peter.  I've had a poke about in qemu-linaro, OpenStack, and
libvirt to get a feel for the KVM integration work.  My scratch notes
are here:
 https://wiki.linaro.org/MichaelHope/Sandbox/QEMUA15GuestNotes

I'm feeling happy about the integration.  The parts that I've seen
have good separation, are architecture neutral, and have some ARM
support.  We can prototype using virtual x86 based masters and QEMU
TCG based compute instances.

I've seen a few bugs and assumptions: OpenStack defaults to virtio,
boot=hda, and fixed kernel args; and libvirt can't parse the the
qemu-linaro version string.  There will be more.

I'll feed this into the KVM 1.0 task list and share it.

-- Michael