CentOS virt - Jun 2015 - Draft of new centos-release-xen rpm source available on github

I pushed a draft of a new centos-release-xen rpm repo here:

https://github.com/gwd/centos-release-xen

The source of this works for both C6 and C7.  There's already a C7
package in virt7-xen-44-candidate, and there should be a C6 build in
virt6-testing soon.

This is to Johnny in particular, but any feedback is welcome.

-George