Update xenserver-install-wizard

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #168 from euanh/build-improvements

xenopsd: Add missing install dependency on qemu-system-x86
Merge pull request #165 from djs55/xenserver-install-wizard

Update xenserver-install-wizard
xapi, wizard: Release should start at 1

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