Set poster size

SPIE specify 45"x45" but my poster tube is 38.5" long.  Setting the
size to 1" less than these sizes.
Reduce histogram width and add y-axis label
Adjust publications chart to match histogram

Changed color for HARP and removed lines.
Tidy up poster tiling scheme table
Try pattern for HARP in poster histogram
Add text to source catalogs panel
Change shade of green on the publications plot
Re-arrange poster panels

First attempt at sensibly arranging the panels.  One possible
problem with this layout is that the conclusions aren't in the
lower right.
Revert "Try sans-serif headings to match JAC logo"

This reverts commit a24bd197103b8ca459d219ecbf97ac70ab7ee412.

I think I prefer the normal font here.