G8: remove all references to G8 code
Remove unused code
summary table: make top header sticky

This is a quick and horrible hack to make the thead for the summary
table "sticky" -- that is, it stays at the top of your browser window
when you scroll down the table.

This involves a number of somewhat horrible things, including but not
limited to:

- A polyfill for "position: sticky;" (which isn't actually implemented
  yet in most production browsers). Fair enough.

- A hack to ensure that when the <thead> is turned into one with
  "position: fixed;", the table layout is not altered. This involves
  calculating the widths of the columns at page load time and
  retroactively hardcoding those as widths on each table cell. I might
  want to go and burn a few fingerprints off for this one...

- Some quick and hacky fixes to the table sorter to ensure that it will
  work with two sorters -- one at the top and one at the bottom of the
  table.