branflake2267/GWT-Maps-V3-Api — pull request #48 by cyclingthealps (2012-10-03 18:49:43+00:00)
Title: Added the opacity method for the GroundOverlay

I am not sure yet which changes you are going to see.
I updated first with the latest of your master.
Then I made some changes to the GroundOverlay class.
Changed the setMapImpl and getMapImpl method and added the Opacity method

Don't trust me yet as I am learning how to use this stuff. :-)