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