Add matplotlib versions of plotting examples.
Add matplotlib versions of plotting examples.

pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff,pdbartlett/misc-stuff