migurski/TileStache — pull request #130 by migurski (2013-05-26 22:28:35+00:00)
Title: Fixing incompatible TileStache.getTile() signature introduced in release 1.47.0

I didn’t check to see that `getTile()` had a guaranteed signature in the documentation, so this is an attempt to walk that decision back while maintaining the benefits introduced by the three-tuple response in `Core.Layer.getTile()`.