Pass a replay group to ol.render.Event
Make ol.FeatureOverlay use replay group
Hit detection for features drawn at pre/postcompose
Clone skippedFeatureUids_
Defer selection/deselection
Finish the replay group after dispatching the compose event
Flush the vector context after replaying the batch
Do not "export" ol.render.Event#replayGroup
Improved forEatchFeatureAtPixel docs
Add new tests for FeatureOverlay

In the process of creating these tests, a bug with setting this._style
was also fixed.
Add ol.renderer.vector.getSquaredTolerance and ol.SIMPLIFY_TOLERANCE
Use setStyle in the constructor
Fix remaining API doc issues with squared tolerance vs. tolerance
Merge pull request #2254 from elemoine/replaygroup

Use replay groups for feature overlays