Add ocamldoc for the Nbd_lwt module.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Added license header and note that Nbd is the low-level interface.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Update the Unix test to use Nbd_unix

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Add support for building via obuild.

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Switch build to obuild + make; ensure 'make install DESTDIR=...' is useful

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

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Add missing license headers.

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