Added ctrl/meta toggles to both WheelZoom &  WheelScroll mode;  when ctrl/meta is depressed, the multitouch swipe will now invert it's behavior to either zoom or scroll depending on which mode it's operating in.
Added ctrl/meta toggles to both WheelZoom &  WheelScroll mode;  when ctrl/meta is depressed, the multitouch swipe will now invert it's behavior to either zoom or scroll depending on which mode it's operating in.

herringtown/gojs-extensions