Can now be used as so:
>>> msg['chat_state']
''
>>> msg
<message />
>>> msg['chat_state'] = 'paused'
>>> msg
<message>
<paused xmlns="http://jabber.org/protocol/chatstates" />
</message>
>>> msg['chat_state']
'paused'
>>> del msg['chat_state']
>>> msg
<message />
Moved SleekTest to sleekxmpp.test package.
Corrected error in XML compare method.
Added TestLiveSocket to run stream tests against live streams.
Modified XMLStream to work with TestLiveSocket.
The sleekxmpp.xmlstream.tostring and sleekxmpp.xmlstream.tostring26 packages
have been merged to sleekxmpp.xmlstream.tostring. The __init__.py file will
import the appropriate tostring function depending on the Python version.
The setup.py file has been updated with the package changes.
ElementBase is now a direct descendent of object and does not subclass ToString.
Stanza objects now return their XML contents for __repr__.
