Minor changes:
 - Merged with local workspace
Minor changes:
- Test implementation
Merge branch 'master' of https://github.com/trulabs/qxmpp
Minor changes:
 - Tests for resume
Minor changes:
 - Error handling and test updated
Stream management request can be called from the client. In order to allow to send request at any time.
Emit Stream Management Enabled from the outgoing client
 - Signals updated to notify when session resumed
 - Test updated
 - Roster is not cleared when resume is enabled
UUID used for stanzas ids.
At the last XSF Summit they announced they don't want people using counters for IDs.