Alternative Canvas proposal from Charles

Charles has asked that the canvas accessibility working group review his
proposal for applying an areamap for accessibility to a canvas. He
indicated that there may be some details missing but that it should be good
enough for review.

http://www.w3.org/html/wg/wiki/ChangeProposals/Map4NotAdom

Charles is traveling on Monday. So, I think the best thing to do is review
his proposal and provide feedback. Charles would like to treat this as a
replacement proposal although it uses some aspects of our original
proposal. His reasoning is that it is easier for the author to have one
solution for addressing canvas.

Let's see if we can wrap this up quickly.

Rich

Rich Schwerdtfeger
CTO Accessibility Software Group