Merged Link types.
Added a function which returns the active item of the Actor group given the event.
Mouse click on a port now creates a circle that drags with the mouse and a line from point of click to the moving marker.
Reimplemented findTarget which now hijacks object selection and returns a marker if the mouse down was on a port. Also added a new state variable that's used for mouse operations with the ports/links.
Changed the accordeon. Like this more.
Added drag&drop. Note very useful for now.