Restructure the metainfo panel to include the legend.
Add the legend.  And a sneaky bonus addition being worked on.
Move to new location, change the empty cell color to a shade of grey,
add descriptions (thanks to Thomas).  A preliminary grid board and
bitmap font have been added.
curlies
Slight rephrase.
Specify a sim via the ?sim= URL query parameter (without the ".json"
file extension).
Fix the margins and placement and also the tabs in this file.