Offset Referenced Image Data

[Sannyasin Brahmanathaswami]

I put this enhancement request in if anyone is interested

http://quality.livecode.com/show_bug.cgi?id=20473

in brief

" We need the ability to have an image object "mask" referenced image data by setting the offsets of the image, common use case is "I need this in a square"

But don't want to mess with importing images and clipping via group props.

effectively the same thing as "overflow-hidden" in CSS