Add repository for 4.8. Leave default at 4.6 for now.

Point centos-release-xen to Xen 4.6 for CentOS 6

Break out version-specific packages for those who don\'t want to update

Fix bug \in grub-bootxen.sh that caused no initrd line to be installed

buildlogs (centos-virt-xen-testing) packages are not signed

Removed CBS repositories
Moved C6 repos to Virt SIG layout
Include all files so we can build the same srpm on any arch

Add dependency on Virt SIG gpg key
Shifted /etc/sysconfig/xen-kernel to xen package

Configure for aarch64 systems

Change virt6 repos to new format (virt6-xen-{44,46}-{testing,candidate})

Fix grub-bootxen.sh script

Update GPG key name
Fix link following bug \in grub-bootxen

Update core C7 repos

Use plain files rather than a tarball for easier source tracking
Add Virt SIG repos (disabled by default)

shifted /etc/sysconfig/xen-kernel to centos-xen-release

Modified grub-bootxen.sh to allow for automatic grub updates for kernel install