Use default style function in FeatureOverlay
Add oli.FrameState extern
Use oli.FrameState instead of ol.FrameState
Add oli.View2DState extern
Use oli.View2DState instead of ol.View2DState
Fix the pointer index

It has to point to the end of the current block, not to the
beginning of the next block. See L581.
Merge pull request #1827 from elemoine/featureoverlay

Use default style function in FeatureOverlay
Merge pull request #1833 from ahocevar/hit-detection-pointer

Fix the pointer index
Add and export documentation for ol.render.canvas.Immediate
Merge pull request #1835 from pagameba/doc-canvas-immediate

Add and export documentation for ol.render.canvas.Immediate
Add offsetX and offsetY properties to ol.style.Text
Merge pull request #1828 from twpayne/frame-state-extern

Prevent renaming of frameState properties
Merge pull request #1839 from fredj/text-offset

Add offsetX and offsetY properties to ol.style.Text
Add new 'accuracyGeometry' property to ol.Geolocation
Use accuracyGeometry in geolocation example