Update jquery.storelocator.js

- Possibility to add custom variables in locations (Now extended to KML source)
- Allowing originMarker regardless of fullMapStart has been set
- Adds originMarker to bounds, when zoomLevel is 0, to give a better context of distance
Renamed variable from $this to $placemark
Renamed variable from $this to $placemark
Merge pull request #13 from JimmyRittenborg/patch-3

Update jquery.storelocator.js