Update to stdext 0.10.0

Signed-off-by: John Else <john.else@citrix.com>
Update to nbd 1.0.2

Signed-off-by: John Else <john.else@citrix.com>
Patch nbd to not install nbd-tool

Signed-off-by: John Else <john.else@citrix.com>
Update to vhd-tool 0.7.2

Signed-off-by: John Else <john.else@citrix.com>