/**
* This is a SPARK [1] formatter that uses Google Maps API V3 [2] to display
* geo-localised data.
*
* [1] http://km.aifb.kit.edu/sites/spark/
* [2] http://code.google.com/apis/maps/documentation/javascript/
*
* Copyright 2011, Pierre-Antoine Champin (champin.net)
* This file is distributed under the GNU Lesser General Public License v3;
* see file LICENSE.txt .
*
* REQUIREMENTS
* * the google maps API must be included in the page with the following html:
*
* * in Chrome, it seems that this script must be loaded with a