Create a {{map}} macro for XWiki Syntax 2.0

The map macro will display a map based on either a location or a coordinates parameter, using a web map provider.
Providers envisaged :

• maps.google.com
• maps.live.com
• maps.yahoo.com

The provider could be chosen will a macro parameter, for example :

 {{map service="googlemaps" location="Pernety, Paris, France"/}}

Or using a macro alias for each service

{{yahoomap location=""Pernety, Paris, France"/}}

(Or support both)