Bump version
Create README.md
Add requirements file.
Update compatibility code.

Newer example code from SleekXMPP is written this way.
Add basic communication with central tracker.
Use UUIDs to identify machines.

Closes #7.
Stop XMPPVOX if cannot obtain a session id.
Add seconds to logging date format.
Handle exceptions when closing sockets that might be already closed.
Add support for custom messages with /session/new.

Messages can happen for two reasons:
1) Tracker denied the creation of a session.
2) Tracker created a session and want to inform some news.