I don't necessarily think all of these make the code better or easier to read, but it's easier to just go along with what the tools want, since they do generally make things better.
There should be no functional changes here.
Add a new command line script, dish_obstruction_map.py, that writes a PNG image based on the obstruction map data queried from the dish.
Supports color or greyscale output and either with or without alpha channel.
Does not yet support running in an interval loop, mostly because that will require templatizing the output filename in order to be useful.
Tracked on issue #27
