Enable better interaction with maps

I’d like to be able to get information back from the maps. Specifically, I’d like to be able to get the lat/long of map’s center.

An example of how this could be used is the following flow: 1) app opens map centered on a particular lat/long, 2) user zooms/moves map, 3) map tells Corona the new lat/long of the map’s center. [import]uid: 61256 topic_id: 37293 reply_id: 67293[/import]