Missing things from TMT Model Export

[danielsiegl]

As reported by @wobrschalek

TMT model exported.
The log file shows:
Element with type: Read Self Action is not supported yet!!!
Element with type: Read Structural Feature Action is not supported yet!!!
Element with type: Read Structural Feature Action is not supported yet!!!
Element with type: Reference Property is not supported yet!!!
Element with type: Add Structural Feature Value Action is not supported yet!!!
Element with type: Time Expression is not supported yet!!!
Element with type: Duration is not supported yet!!!
Element with type: Duration Interval is not supported yet!!!
Element with type: Expression is not supported yet!!!
Element with type: Comment is not supported yet!!!
Element with type: Type is not supported yet!!!
Element with type: Problem is not supported yet!!!
Element with type: Structured Activity Node is not supported yet!!!