Improve aesthetics

[mvanmoer]

This is a catch-all issue.

• Look at colorbrewer for fill colors
• desaturate the red used for outlining new items
• better font for the node labels
• and the big one - better graph layout algorithm

[mvanmoer]

• found some decent colors with colorbrewer, these can always be changed
• desaturated the "new item" red
• IIUC we only get to chose font-family with draw_networkx_labels, serif or sans-serif, so leaving sans-serif

[mvanmoer]

Need major help with the new data - there are a much larger number of nodes and they are getting squished into the subplots. Need to effectively zoom out somehow - either shrink the nodes or enlarge the subplots. This will possibly tie into the page dimensions, too.

[mvanmoer]

It does tie into the page dimensions. By going from letter size to quad-letter (16"x23") the ExRx data is not as squished into the subplots, however, it them becomes unreadable. So a question is, should these be a series of single images instead of a tiled image?