AMI: Implement copy_image.
AMI: Implement copy_image. (part 2, tweaked launch_permission_groups init)
AMI: Implement copy_image. (part 3, added boto version threshold)
AMI: Implement copy_image. (part 4, minor refactor for clarity)
Merge pull request #216 from DreadPirateShawn/ImplementCopyImage

AMI: Implement copy_image.