Add options object to ol.render.FeaturesOverlay constructor
Export ol.render.FeaturesOverlay
Add urls option to ol.source.VectorFile
Add urls option to ol.source.GeoJSON
Add urls option to ol.source.KML
Add urls option to ol.source.KML
Use urls option in igc example
Fix indentation in commments
Merge pull request #1468 from fredj/indent

Fix indentation in commments
Display attributions and logos for vector sources
Fix 'singleclick' in kml-timezones and kml-earthquakes examples
Add ol.render.IRender#drawAsync
Add ol.render.canvas.Immediate#drawAsync
Add ol.render.webgl.Immediate#drawAsync
Add ol.render.canvas.Replay#drawAsync
Use drawAsync in render box
Use drawAsync in canvas Immediate#drawFeature
Fix ol.geom.flat.linearRingContainsXY
Merge pull request #1470 from twpayne/vector-api-attributions

[vector-api] Display attributions and logos for vector sources
Merge pull request #1473 from elemoine/vector-api-zindex

[vector-api] Make canvas immediate API support zIndex