Bug 5699 Add ResourceTransfer to packages view
The packages view should add the ResoruceTransfer as a drag source to its list of transfers
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/dnd/JdtViewerDropAdapter.java
public void dragLeave(DropTargetEvent event) {
		fTarget= null;
		fLocation= LOCATION_NONE;
		fLastScroll= 0;
	}
	
	public void dragOperationChanged(DropTargetEvent event) {
		fRequestedOperation= event.detail;
		fTarget= computeTarget(event);
		fLocation= computeLocation(event);
		validateDrop(event);
		fLastOperation= event.detail;
		computeFeedback(event);
	}
	
	public void dragOver(DropTargetEvent event) {
		Object oldTarget= fTarget;
		fTarget= scrollIfNeeded(event.x, event.y);
		
		if (fTarget == null) 
			fTarget= computeTarget(event);
		
		
		int oldLocation= fLocation;
		fLocation= computeLocation(event);
		if (oldLocation != fLocation || oldTarget != fTarget || fLastOperation != event.detail) {
			validateDrop(event);
			fLastOperation= event.detail;
		} else {
			event.detail= fLastOperation;