wildcard events

Currently events are matched with tokens e. g. in buffer_event() we expect target to be set. Is there a way to define 'wildcard' events? Such an event should be dispatched to every connected client regardless of a token.

[guyzmo]

To be honest, I don't remember much whether I did implement such a feature. But I don't think I had a use for it, so I might not.

If you implement it, I'd be happy to accept a PR though :)

I've workarounded it by just hardcoding app-specific prefix for the time being :)