Integrate Lee's Meso suggestions
Compare changes
Prefix all of this with "apparently...", because I'm not exactly an AWIPS expert.
Meso filenames should begin with "MESO" rather than "MESO1" or "MESO2".
The source_scene attribute should be one of "Mesoscale-1" or "Mesoscale-2" rather than "Mesoscale".
I thought it best to get the ball rolling with this stuff rather than agonize over whether or not I could integrate things better. That said, I'm happy to any make changes!