[libvirt] libvirt profiles (a.k.a. virtuned) design ideas draft

After some discussion with people from various management apps we decided to try and create something that would help with common, duplicated, and perhaps easy to extract things for which the code exists in some (or most) of the projects. I'd be glad for any feedback, so here is the rendered document: https://github.com/nertpinx/virt-manager/blob/virtuned-docs/docs/virtuned.md and here you can comment: https://github.com/nertpinx/virt-manager/pull/1/files Even though this does not concern libvirt developers, I'm adding pointers here in case someone wants to chime in.