working directory.
Skips PDFs since we have no way to compare them.
Includes prototype of --weighted option to scale percent different metric by
intensity of difference at each pixel.
(qv http://codereview.appspot.com/4557042/)
git-svn-id: http://skia.googlecode.com/svn/trunk@1411 2bbb7eff-a529-9590-31e7-b0007b416f81
into a third directory, and create a summary web page with metrics for easy
inspection of the results.
git-svn-id: http://skia.googlecode.com/svn/trunk@1200 2bbb7eff-a529-9590-31e7-b0007b416f81
