Added mAmu calculation in stateChanged(). Test cases 2-09 and 3-03 are passed.
	modified:   copasi/trajectory/CStochDirectMethod.cpp
-needed to connect the sorting proxy model dataChanged SIGNAL to the
underlying CQTimeSeries Data Model, so it could let mpTableView know
when the framework had been toggled (all values changed from/to Concentrations
/Particle Numbers). I believe Qt should have this automatically happen
when setSourceModel is called. Apparently someone else agrees with this idea:
https://gitorious.org/spena-playground/xmcr/commit/8521535
Fixed Bug 2088. The Avogadro constant is now set to the imported model and
not to the  in COPASI existing model.