Add styles for .ol-touch .ol-zoomslider
Fix zoomslider controls to match zoom controls more closely
Update the zoomslider example to have better styling for touch devices
Update zoomslider custom styling to match control styling changes
Take pixel ratio into account in layer-spy example
Merge pull request #1889 from twpayne/layer-spy-pixel-ratio

Take pixel ratio into account in layer-spy example
Merge pull request #1614 from Intermedix/ol-touch-zoomslider

Add styles for .ol-touch .ol-zoomslider
Add ol.array.safeExtend
Use ol.array.safeExtend in ol.geom.LineString
Use ol.array.safeExtend in ol.geom.MultiLineString
Use ol.array.safeExtend in ol.geom.MultiPoint
Use ol.array.safeExtend in ol.geom.MultiPolygon
Use ol.array.safeExtend in ol.geom.Polygon
Use ol.array.safeExtend in ol.format.GML
Use ol.array.safeExtend in ol.format.KML
Merge pull request #1892 from twpayne/fix-stack-overflow

Fix stack overflow when handling very, very large numbers of coordinates
Geolocation tracking with orientation example
Merge pull request #1859 from pgiraud/geolocation_tracking_orientation

Geolocation tracking with orientation example
Merge branch 'official-master'