Extensions to EGeoXml[1]

[1] http://econym.org.uk/gmap/egeoxml.htm

Additional Features:

* min-zoom - Set minimal auto zoom, useful when auto zooming to a single marker.
* ExtInfoWindow[2] integration - Allows the use of ExtInfoWindow for InfoWindows(bubbles). (in development)

[2] http://gmaps-utility-library-dev.googlecode.com/svn/tags/extinfowindow/1.1/docs/examples.html

== ExtInfoWindow ==

It is assumed you know how ExtInfoWindow works. If not, please familiarise yourself with it at [2].

When creating the EGeoXml object, add the following options:
extinfowindow: 'custom_window_name'
eiwoptions: { option1: value1, ...} - this is optional. It stands for 'extendedinfowindow options', similar to how 'iwoptions' stands for 'infowindow options'.

Example:
egeoXml = new EGeoXml("egeoXml", map, url, {
                                      extinfowindow: 'simple_window_example',
                                      eiwoptions: {beakOffset: 3}
                                });
                                
There is only a few lines of code changes to egeoxml.js starting at line 202.