fixing up for release of 0.04
Fixed some bugs in OOB and registration.
Finally implemented the last parts of in band registration. Let me call it 'in band frustration'!
implemented OOB and fixed bugs in Disco and further developed in band registration.
lots of changes. added as_string to Net::XMPP2::Node to restore the original xml document part of a stanza or subtree. also implemented the jabber component protocol.
added initial_presence argument to the IM::Connection and the Client. added and upgraded some examples. further work on the registration forms.
finished up the next release.
fixed some bugs, redesigned disco mechanism, probably added some bugs, added samples/disco_test example.
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