implemented kernel DND

...e/ui/dnd/gef/ConnectionCompositionDropTargetListener.java

...ortiss/tooling/base/ui/dnd/gef/ConnectionDragContext.java

...ortiss/tooling/base/ui/dnd/gef/ConnectionDropContext.java

...base/ui/dnd/gef/ElementCompositionDropTargetListener.java

...g/fortiss/tooling/base/ui/dnd/gef/ElementDropContext.java

...ase/ui/dnd/jface/ViewerElementCompositionDropAdapter.java

...ooling/kernel/ui/dnd/CompositionServiceLocalTransfer.java

...kernel/ui/dnd/ConnectionCompositionDragSourceAdapter.java

...kernel/ui/dnd/ConnectionCompositionDropTargetAdapter.java

...ss/tooling/kernel/ui/dnd/ConnectionCompositionSource.java

...ng/kernel/ui/dnd/ElementCompositionDragSourceAdapter.java

...ng/kernel/ui/dnd/ElementCompositionDropTargetAdapter.java

...rtiss/tooling/kernel/ui/dnd/ElementCompositionSource.java

.../trunk/src/org/fortiss/tooling/kernel/ui/dnd/package.html