openlayers/ol3 — pull request #1316 by tschaub (2013-11-26 19:01:17+00:00)
Title: Add adapted version of rbush

This pulls in @twpayne's adaptation of rbush. It includes changes in the `ol.extent` package that are not strictly required by rbush, but I'm looking for harmony here and don't see the point in resolving conflicts in `ol.extent` more than once.