Implemented

	TC_DEN_MSGF_BV_01-02,
	TC_DEN_EVGN_BV_01-15,
	TC_DEN_SSCI_BV_01-03,
	TC_DEN_TDEV_BV_01,
	TC_DEN_TNEV_BV_01-04,
	TC_DEN_DRCX_BV_01-04
Added TODOs.
Trigger and preamble functions are just dummy implementations.
Resend of messages not yet handled in TTCN-3.