CloudMade/Leaflet — pull request #963 by danzel (2012-08-30 22:52:37+00:00)
Title: Correct TileLayer zIndex behaviour on bringToBack

Previously if you had 2 Tile Layers, neither of which had a zindex we'd set the zIndex to 0 on bringToBack and not remember it. On zoom it would revert and the layer would go behind.
Also Add a test page for tile layer zIndex.

Fixes #959