Modified HtmlElement.preventBrowserDragDefaults() to handle events directly
HtmlElement event handlers no longer leak 'event' parameter
Removed 'selectstart' event API from HtmlElement
Updated to-do
Consolidated touchend/touchcancel tests; improved single-touch tests
Added test for multi-touch events
Cleaned up event handling tests
Consolidated touchend and touchcancel event functions
Simplified triggerTouchEvent functions
Simplified onTouchEvent functions in HtmlElement
Updated to-do
Removed 'integrate' task from to-do
Updated to-do