Change log to RBXmppNotification extension for Review Board

Version    Date          Description
-------    ----------    -----------
0.3        07.08.2013    Send message to all receivers over the same connection
                         Added configuration for connection timeout
                         Added configuration for tls verify peer self-signed certificate
                         Improved logging

0.2        07.05.2013    Fix to make extension work with Python 2.6 on RHEL 6.3

                         Note: the pyxmpp2 is not compatible with Python 2.6. To get is running
                         with the older Python version do the next change in the file:
                            /usr/lib/python2.6/site-packages/pyxmpp2-2.0alpha2-py2.6.egg/pyxmpp2/etree.py

                            <     elif sys.version_info.major < 3:
                            ---
                            >     elif sys.version_info[0] < 3:

0.1        06.05.2013    First commit