nserver contributed by Victor Salaman

FYI, I've just added a NIO based server contributed by Victor Salaman to
jPOS-EE opt directory (see http://jposee.googlecode.com) and
http://jpos.org/jposee/jPOS-EE.pdf for general information about
jPOS-EE.

I didn't test it yet, but as always, reading Victor's elegant code is
nice and a learning experience, so I encourage you to review.

--Alejandro

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