Started working on testing touch end events
Added 'triggerTouchEnd' to replace triggerSingleTouchEnd()
Updated to-do
Added HtmlElement.triggerTouchCancel()
Added test to reproduce 'no dot on tap' problem for iOS devices
Removed no-longer-needed triggerSingleTouchEnd() and triggerSingleTouchCancel()
Added HtmlElement.onTouchEnd()
Added HtmlElement.onTouchCancel()
Modified client.js to draw dots when screen is tapped on iOS
Removed no-longer-needed onSingleTouchEnd() and onSingleTouchCancel()