Set maximum number of columns for Pandas columns

[boydgreenfield]

In our recent blog post example, the PDF export includes a table that overflows. We should probably have a pd.set_max_columns (note I don't actually remember if this is the real function name) settings call in the PDFification prelude to ensure we don't get overflows. Ditto for plots.

[boydgreenfield]

Figures look like maybe the legend can overflow a bit too:

[boydgreenfield]

Final minor issue, it looks like code formatted text can have weird padding on it in the PDF rendering:

becomes: