openlayers/openlayers — pull request #375 by anru (2012-03-30 07:11:56+00:00)
Title: Add feature indexer for canvas renderer

In Canvas renderer only one way to control draw ordering for features - add and remove features to renderer, actually to it's hash-map. And iteration order for hash-map is new id - latest in a iteration. But not in IE9.
In IE9 deleted keys are preserves order if insert same key again.

I'm added test for this, and also add graphicZIndex support for canvas renderer.