Rename devicePixelRatio to pixelRatio in ol.FrameState
Merge pull request #1534 from twpayne/vector-api-pixel-ratio

[vector-api] Rename devicePixelRatio to pixelRatio in ol.FrameState
Add new 'accuracyGeometry' property to ol.Geolocation
[fixup] Add new 'positionGeometry' property to ol.Geolocation
snapshot