WSMO4J 0.6.0 patch to support annotation propagation

Hi Marin,

attached is a patch that enables WSMO4J 0.6.0 to do annotation
propagation. I will use this patch to fill in the SAWSDL CR
implementation report, if you don't object (and I will link to this
email to point to the patch).

Please let me know should WSMO4J be updated (before we go to PR) to
handle propagation, using this patch or otherwise. 8-)

Best regards,
Jacek