As a few changes have been made since January (when people last
checked) I decided to do it properly this time with an RC1. It is not
in maven central and won't be. If you're interested in seeing if I've
broken your code BEFORE I lock it down as v2.0, then please download
it, test it and report back here.
(For example today, I fixed an issue where the classes were not
properly immutable on Java1.5+, which required use of refection for
the mutable classes, which may affect you)