Add xe.0.6.0 (XenServer CLI)

Signed-off-by: David Scott <dave.scott@citrix.com>
xe depends on uuim (thanks to @samoht for pointing this out)

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #1926 from djs55/xe.0.6.0

Add xe.0.6.0 (XenServer CLI)