Replace existing OCPF recipients implementation with a SRowSet

Replace existing OCPF recipients implementation with a SRowSet
Use PT_UNICODE instead of PT_STRING8 for most string properties (except MNID_ID specifically tagged as PT_STRING8)
Use Recipient blocks instead of strings similar to:

RECIPIENT {
	TO {
		prop1 = propvalue
		prop2 = propvalue2
	};

	CC {
		[...]
	};

	BCC {
		[...]
	};
};

Works with internal/external recipients too.

git-svn-id: https://svn.openchange.org/openchange@2709 71d39326-ef09-db11-b2a4-00e04c779ad1