Document event stability even when there is no description
Accept resolution or zoom related options for constrained views

Any of minResolution, maxResolution, minZoom, or maxZoom can be used to constrain the view resolutions.  Resolution options are given precedence over zoom options.
Merge pull request #2077 from ahocevar/event-stability

Document event stability even when there is no description
Handle minZoom in getZoom and setZoom
Merge pull request #2079 from tschaub/view-options

Support zoom and resolution constrained views.
Add missing @param annotation
Merge pull request #2083 from elemoine/missinganotation

Add missing @param annotation
Make the scale factor of ol.format.Polyline configurable
snapshot