(Bug 57707) Clean up dead code (that was the source of exceptions)

* While I found a simple fix for the exceptions, I discovered that
  the code was totally dead -- the value computed by that code was
  not being used. So, even better!

  Arlo is correct that we had this crasher-source for a long time.
  That said, commit 283bfd55 cleaned up a lot of this code and
  effectively rendered this piece of code dead, but didn't cleanup
  completely.

* Eliminates crashers (without the hotfix from d3e5d034) in:
  http://localhost:8000/nlwiki/Lijst_van_talen_van_de_wereld

* Added a parser test to prevent future regressions.
  - This test fails wt2html mode because Parsoid parses the
    table rows in <*include*> tags as a table attribute instead
	of a table row. This will have to be fixed in a different patch.

Change-Id: I3885f0c12c461a6e676c54c64e7ba2ad88ffe135
Merge "(Bug 57707) Clean up dead code (that was the source of exceptions)"