RFD 26: remove how to expose volume sizes from open questions section, add billing_id to volume objects
RFD 26: remove how to expose volume sizes from open questions section, add billing_id to volume objects

AnthonyMann/rfd,davepacheco/rfd,joyent/rfd,joyent/rfd,joyent/rfd,davepacheco/rfd,rmustacc/rfd,melloc/rfd,melloc/rfd,rmustacc/rfd,AnthonyMann/rfd,melloc/rfd,davepacheco/rfd,davepacheco/rfd,joyent/rfd,davepacheco/rfd