WIP collaboration to make a keyboard- and screen reader-accessible shim for the Google Maps API.
To implement:
1. Load accessible_gmaps.js and accessible_gmaps.css into any page containing a Google map. jQuery is also (currently) required.
2. When creating markers or adding new markers to the map, call accessibility_addMarker(marker), where marker is the marker object.
3. After your map is loaded and has bounds (usually just before you'd display it to the user), call accessibility_onload(map, mapIdentifier, options) with these parameters:
map: the map object (created with new google.maps.Map())
mapIdentifier: a CSS identifier unique to your map, used by jQuery to add the shim elements.
options: an array of settings for the shim. Currently unimplemented.
