There are actually 5 different implementations of quicksort in here when
one will do (the array versions could go away and call the list version,
wrapping in Arrays.asList()). But I won't touch those right now. I am
super tempted to reduce things down to one List version and one array
version.
Also it's weird that there are customized Comparators that are null-safe.
I believe I was the one who added them in the past, but I've since learned.
It's a strange undocumented "convenience" when it's easy enough for someone
to provide a null-safe comparator for comparables. (In guava you can call
Ordering.natural().nullsLast()).
git-svn-id: https://samskivert.googlecode.com/svn/trunk@2988 6335cc39-0255-0410-8fd6-9bcaacd3b74c
ray.j.greenwell
e02fb89cb0