Listen to multiple events using wildcard in event handler type.

[guilhermelimak]

The user should be able to listen to more than one event using a wildcard.

The type field in the handler object could contain the '*' to match any character from that point on. E.g. a listener using 'message*' type should match events like 'message:received', 'message:sent', 'message'.

The documentation on event handlers should be updated (or created if needed) to conform to this changes.