Infrastructure for app type switching
Added basic tornado app
bottle_app - fixed error message
tornado_app - added start-session handler
r2x_tornado_app - added async worker for long running tasks
Created all required handlers except notification
xmpp_session - fixed methodth mapping

fixed add_contact and contact_by_jid
xmpp_session - added wait_for_notification method
xmpp.secure_client - changed remove_contact method
tornado_app - fixed delete contact async call
tornado_app - notification method created
tornado_app - notification handler with coroutine
xmpp_session_pool.session Removed poll notificators
Renamed some classes in xmpp_session_pool
xmpp_session_pool.push_notificators - APNWSGINotificator with Queue
message_store - some tuning
session_pool - newlines
xmpp_session_pool.xmpp_client - removed too often notifications
pyapns.pyapns_client - separate worker threads replaced with thread pool
pyapns.pyapns_client - revert back