Added abstract AnnexInstance class to InstancObject
Organized imports (one unused import couldn't be resolved)
Added annex subclause to property set
Now attribute 'derivedModes' in component classifier
Attribute 'derived' of mode now comes from the component classifier
New images
Mark derived attribute in Mode as readonly
Support arrays as component and feature prototype actuals
Fixed port and feature prototype actuals
Fixed diagram(s)
Store annex name in containment path of a property association
Corrected typo in class name
Added reference from annex instance to annex subclause
Updated Meta model.
Moved derivedModes flag to Classifier. 
Fixed spelling of vi(r)tualBus...

Fixes Issue #308
Fixes Issue #306