Add travis

Attempt to test both the with- and without- xen configurations.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Use the configure script to detect the xen headers

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Regenerate OASIS

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #2 from djs55/add-travis

Add travis
travis: add cmdliner

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
travis: 'make test' needs to run on xen

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Merge pull request #3 from djs55/add-travis

Conditionally compile the stubs subpackage if xen headers are present