use <open/> <close/> tags instead of <session> </session>
change parser type and match <close> as a stream end
match stream error, change name of parser type
Fix stream error predicate
Add support for old-type Websocket connection
Use new exml options instead of fake root element
Use correct exml version
Fix typo in rebar.config
Merge pull request #19 from esl/ietf89-update

IETF89 - XMPP over Websocket support for <open/> and <close/> tags