Getters and setters for line symbolizers
Preserve unexpected items in options object passed to the constructor
Getters and setters for polygon symbolizer
Getters and setters for shape symbolizers
Fixing bug with IconLiteral#equals and adding tests
Getters and setters for icon symbolizer
Adding tests for text symbolizer
Getters and setters for text symbolizer
Merge pull request #861 from fredj/layer-options

Preserve unexpected items in options object passed to the constructor
Merge pull request #862 from tschaub/mutable-symbolizers

Provide getters and setters for symbolizer properties
Replace the a tag inside a div with a button
Add .ol-button-group CSS class name
Add ol.control.Zoom#zoomByDelta function

To replace ol.control.Zoom#handleIn_ and ol.control.Zoom#handleOut_.