[html-formfu] stash_valid

[Carl Franks]

If anyone's been keeping up to date with svn, they may have noticed a
stash_valid() feature I added recently.

I've now replaced this method with a new StashValid plugin.
I won't be providing backwards compatibility for the stash_valid()
method, as it's never been released to cpan, and I've never even
announced it on the list

If you want to know what it's all about, it's documented!
    lib/HTML/FormFu/Plugin/StashValid.pm
(although the actual plugin mechanism isn't documented yet)

Carl