- add unsubscribe capability (http://xmpp.org/rfcs/rfc3921.html#sub §6.4) + test
Merge pull request #56 from Roobiz/master

- add unsubscribe capability
1.2.4
Merge branch 'master' of github.com:lloydwatkin/xmpp-ftw into last-message-correction

Conflicts:
	package.json