xenserver-install-wizard: Update source location

Signed-off-by: Euan Harris <euan.harris@citrix.com>
Merge pull request #350 from euanh/upstreaming

xenserver-install-wizard: Update source location
ffs: Update to 0.9.24, with vdi-clone fix

Signed-off-by: Euan Harris <euan.harris@citrix.com>