xendevsummit14: add the cubieboard picture + joke (TM)

Signed-off-by: David Scott <dave.scott@citrix.com>
xendevsummit14: add the joke promised in last commit

Signed-off-by: David Scott <dave.scott@citrix.com>
Improve the test instructions

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #23 from djs55/xendevsummit14

xendevsummit14: add the cubieboard picture + joke (TM)