kangax/fabric.js — pull request #170 by konieczkow (2012-05-29 11:23:07+00:00)
Title: Rotation point stopped working after flipY.

When I turned the fabric.Image upside down with flipX the rotation point stopped working. What i learned is that rotation point's coords don't rotate with the image, but its graphic (border and corner) do.
This commit fixes this bug by adding additional invisible rotation point below object.