Add an opam file

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

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
Remove OASIS autogen files, generate on demand

Signed-off-by: David Scott <dave.scott@eu.citrix.com>
opam: depend on ctypes and oasis

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

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