Add search feature capacity in georchestra sviewer

This capacity works for WMS Layers (from context or not) and for KML layers.
test it here http://kartenn.region-bretagne.fr/m/?layers=rb:lycee_rb&title=Les%20lyc%C3%A9es%20bretons&s=1

Just add this new kvp parameter in url to activate the function (s=1)