Move createDefaultEditingStyles() to ol.style
Return rather than fail if resolution is not defined
Merge pull request #2527 from pagameba/cluster-fix

Return rather than fail if resolution is not defined
Change ol.TileCoord to an Array
Merge pull request #2539 from elemoine/tilecoord

Change ol.TileCoord to Array.<number>
Do not hit-detect the same feature multiple times

In other words forEachFeatureAtPixel should not call the user-provided callback more than once for a given feature.
Use opt_tileCoord in ol.source.WMTS tileUrlFunction
Use tmpExtent in ol.source.WMTS tileUrlFunction
Merge pull request #2543 from elemoine/foreachfeature

Do not hit-detect the same feature multiple times
Merge pull request #2528 from fredj/wmts-source-optim

ol.source.WMTS optimization
Params not correctly handled in MapGuide source
Merge pull request #2544 from elemoine/mapguide

Params not correctly handled in MapGuide source
Added some api annotations required for accessing layer properties
Export getHTML method of ol.Attribution to the api
Export getLayers and setLayers methods of ol.layer.Group

This is nicer than having to use .get("layers") and .set("layers", x).
Merge pull request #2513 from probins/editstyle

Move createDefaultEditingStyles() to ol.style
Merge pull request #2512 from petrsloup/olcs-missing-api

Make API of raster sources more convenient