There was a bug in Stylist title function when dealing with GEOMETRYCOLLECTION: the title function removed all children, resulting in all child geometries being removed in case of a collection.
This patch makes a check before removing children to create titles and also adds titles to children in case the geometry is a collection.
Fixed GeometryCollection title bug: children geometries were complete…
Fixed GeometryCollection title bug: added check for circle
This looks good to me. @mbostock?