Cobbler: having Xen images use a PXE boot loader

Some new work has been done on making Xen machines be able to use PXE as 
a boot loader.

You can see more here:
https://www.cs.tcd.ie/Stephen.Childs/pypxeboot/

Stay tuned, but this should make management of virt via koan a lot more 
interesting.
Right now koan doesn't have any hooks for this, but I plan to add 
some.   If you're capable enough with Xen, you should be able to try it now.

--Michael