fix digest-md5 with some ejabberd server

* it looke like some response parameters need to be quoted
* so quote username, realm, nonce, etc, ... as in http://tools.ietf.org/html/rfc3920#ref-SASL
Merge pull request #29 from martinbonnin/master

fix digest-md5 with some ejabberd server
Ejabberd compatibility

Add unique cookie for iq requests
Add session parameter
Merge pull request #30 from ir4y/master

Ejabberd compatibility
Merge pull request #1 from mattn/master

merge