Implement Official Google Maps API - Replacing Current Implementation

The task - 'Map Contacts Using Google Maps' - is currently implemented using an unsupported (and apparently no longer functional) interface (i.e. it's broken).

Reimplement this functionality (mapping a selected set of contacts) using the new 'official' Google Maps API: http://www.google.com/apis/maps/

You will need to 'signup' at this url - and get api key(s). Ideally we can get a key that works w/ localhost (that we can use on our local installs) - and keys for our openngo.org URL's that we can use to 'demo' the functionality.

The API Key should be stored as config param (config.inc.php) - with empty default value (in .sample). If the the API Key is empty and the task is invoked - display the following error message:

"Your site must request an API Key from Google, and enter that key in the CiviCRM configuration file (modules/config.inc.php) in order to use the Mapping feature. For more information, refer to http://www.google.com/apis/maps/"

Also, unless it's a real pain - would be good to implement a 'single contact' mapping capability. If so, for contacts that have location data, add a linked 'Map' icon on the contact Selector which pops up a map window for that contact's primary location.