Depend on ruby-libvirt gem since fog does not pull it in
Merge pull request #114 from sciurus/require_ruby_libvirt

Depend on ruby-libvirt gem since fog does not pull it in
Only use vagrant 1.4 nfs changes when running vagrant 1.4.
Merge pull request #115 from sciurus/guard_vagrant14_nfs_changes

Only use vagrant 1.4 nfs changes when running vagrant 1.4.
Allow changing disk bus
Document setting disk bus
Merge pull request #118 from sciurus/configurable_disk_bus

Allow changing disk bus