Reduce size of PDF

[donkirkby]

The PDF is pretty big. I wonder if switching the diagrams to convert from SVG is somehow less efficient than direct calls to the canvas. Experiment with creating the same diagrams using the canvas and SVG, and see what happens to the size.

There are also some tools for compressing PDFs, so experiment with those. The Adobe tool compressed the current version from 1.4MB to 566KB, so that looks promising. See if you can build something similar into the script.