- libvirtd.conf template now suports unix_socket_group defined in
  a attribiutes.
- on suse nova-compute packages is not installing any virtualization technology.
  Implemented support for installing kvm.
- openstack-nova user shuld be member of libvirt group to be able to read
  from libvirt unix_socket. Implemented group resource in libvirt recipie.
Merge pull request #4 from tpaszkowski/grizzly-libvirt

Fixes and improvments for libvirt recipie on suse platform.