openlayers/ol3 — pull request #2821 by elemoine (2014-10-10 13:24:25+00:00)
Title: Add ol.geom.Polygon.fromExtent

@tonio was [positive](https://github.com/elemoine/ol3/commit/f92b0073d89847bb0ee09b0fd261b851ff6b8657#commitcomment-8115108) about it, so here it is. Other suggestions for the function name are welcome.