We have a `renderIntent` function for filters that maps well to the idea of keys in a KML `styleMap`.  See the [`select-features.js` example](https://github.com/openlayers/ol3/blob/1f2ae57e73b9ed1d1fcbf82462d184b2b4f19013/examples/select-features.js#L26-L37) for use of a filter with `renderIntent("selected")`.

It looks like it would take some more significant changes to the parser, but eventually we could parse other keys in the style map and use this `renderIntent` filter.  For now I think it is ok to just parse the `'normal'` key.