Client tests now clean up document body event handlers
Added HtmlElement.removeAllEventHandlers()
Added HtmlElement.pageOffset()
Test of mouse leaving drawing area now works properly cross-browser
Stops drawing when mouse button is raised outside drawing area
Working on stopping drag when mouse button lifted outside browser (doesn't work)
Added ability to trigger mouse events without coordinates
Confirmed that we can trigger touch events without coordinates
Confirmed that drag stops when mouse button lifted outside window
Updated to-do