Rename MaxCounter -> MaxPosInt in the places I forgot.
Some progress on Data.LVar.Counter.
Typo fixes.
Revert "Mergesort builds."

This reverts commit 0831285610758f844d305335b5e7f6ead4c80862.
Add PLDI paper to docs
More Counter work.
Oops, fix a botched rebase.
Merge branch 'new' into 2.0

Conflicts:
	haskell/lvish/Data/LVar/Counter.hs