When using getBoundingClientRect, the returned coordinates are relative to the viewport.  If the page is then scrolled and we have a dom element that is not the document, the top and left offsets are out of date, thus the rotation calculations are off (sometimes by a lot).

In this fix, we instead do all calculations relative to the document (not the viewport) by adjusting the screen.left and screen.top variables with the scroll offset and using pageX/pageY instead of clientX/clientY for the click coordinates.

Remove clearColor/clearAlpha from constructor parameters

CTM.Stream.prototype.readString() should return a String.
Otherwise comparison in the CTMLoader (file.body.attrMaps[ 0 ].name === "Color") won't work and vertexColors won't be initialized.
Also subarray has different arguments than the former substr method.