Add ol.CollectionEvent#getElement
Use ol.CollectionEvent#getElement in LayerGroup
Export ol.CollectionEvent#getElement
Use ol.Collection#getElement in tests
Merge pull request #923 from tschaub/icon

Add xOffset and yOffset support to icon symbolizers.
Merge pull request #929 from elemoine/collectionevent

Add ol.CollectionEvent#getElement
Fix unclosed div in examples/icon.html
Merge pull request #932 from fredj/unclosed_div

Fix unclosed div in examples/icon.html
Move focus_ position update into handleMapBrowserEvent

Otherwise, the position is only updated on keyboard or mouse wheel events.