xmpp_client - sending delivery receipt requests and delivery perorts
xmpp_session_pool.message_store - process delivery events
xmpp_session_pool.message_store - updated messages event_id on delivery report received
xmpp_session_pool.xmpp_client - sending message delivery notifications to observers
xmpp_session_pool.session - trigger client to get updates on message delivery notifications
xmpp_session_pool.xmpp_client - changed client closing routine
xmpp_session_pool.session_pool - added new async dispatcher
xmpp_session_pool.session_pool - used asyncore dispatcher
xmpp_session_pool.session_pool - tornado ioloop dispatcher

dispatcher running in separate thread
xmpp_session_pool.session_pool - dispatchers in a the separate module

using XMPPTornadoMainIOLoopDispatcher by default
tornado_app - new parameters in the server-status
xmpp_client - added connection handler
xmpp_inbound_dispatchers - TornadoIOLoop dispatchers enhancements

TornadoIOLoop dispatchers handle connection and disconnection events
Removed Asyncore dispatcher
removed pyOpenSSL module requirement
xmpp_roster - cached itemId
push_notificators - pyapns batch send
xmpp_client - optimized unread_count performance
message_store - optimized message handling performance
xmpp_client - removed unnecessary checks from _xmpp_message_handler
xmpp_client - disabled xmpppy debugging