section off different stuff like all other tournaments
an idea that could make TieBreaker a very very general way to solve all this shit
TieBreaker now officially supports unfinished (and less usefully, finished) FFA elimination tournaments
move the algs that are actually now unique (not in tournament 0.20.2) into tiebreaker.js and reorganize
improve invalid and add some code and comment cleanups specifically around the topic of demotion (which is still not quite decided)
we no longer split up xplacers by scorediff across groups (between match should be only thing that does this)
prepare for an actual release
begin rewriting docs for this now that it is almost ready for a release