qemu: start working on multiple disks
qemu _form_create_edit: minor rearrangements
qemu: multidisk: fix js create/choose
qemu: multidisk: do not overlap fieldsets
qemu: multidisk: form: display path
qemu: multidisk: view cache and set defaults
qemu: disk cache radio buttons: minor adjustments
qemu-img create: new API, multiple disks...
qemu image create: properly save config
qemu: image: get absolute path from text/browse...
qemu: img: view: allow creation of a new one
qemu: drive: use index rather than bus/unit

and avoid form over-growth... ;-p
qemu: tmp stable ide only -> release
qemu: 2nd disk and following are on virtio
qemu: honour provided cache
qemu: fix vm creation to adopt new API (multidisk)
qemu -drive: start work on if/bus/unit/index form
qemu drive: stub .slots
qemu: form: detect disk slot
qemu: disk slots: minor cosmetics