having spent the last couple of days wrestling with .NET XmlSerializer
and trying to get it to do what is required by XMPP (RFC 3920 & 3921)
this is the preliminary result of that wrestling (you should see the
other guy!): XmppSerializer allows us to serialize Xmpp stanza (and
theoretically deserialize [or reify] them), XmppWriter helps avoiding
various gratuitous crap added in by off-the-shelf XmlSerializer.
this is currently not used anywhere but the plan is to use it for
at least an XMPPBridgeModule.
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