Connection handling moved from xmppsession to xmppclient
Roster handling moved from xmppsession to xmppclient
Messages handling moved from xmppsession to xmppclient
Ability to start multiple sessions with one shared xmpp client
Consistent badge numbers in push notifications for clients with multiple sessions
Fixed incoming message handle sequence
session_pool - some pythonic syntax changes
Changed message storage format
Ignore pypy env
Merge branch 'feature/MultiClient' into dev
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