Remove useless wrapped event
Initialize the logger with basic config in the cli
Rename bufchan to channel

After all, we are dealing with an abstract channel, no need to know if
its buffered or not in the patterns.
Define a channel interface

We are in python so it's merely a way to document the code.

 - requires a channel to accept timeouts on operations directly
 - expose few useful properties
Adapt events to the new channel API
Handle REP/REQ with new channel API
Adapt channel to the new channel API
Adapt heartbeat to the new channel API
Adapt core to new channel API
Adapt the patterns to the new channel API
Channels are closed responsibly by patterns

Instead of doing horrible __del__ stuff and freezing everything in the gc,
and sometimes getting totally absurd errors:
 -> lets cleanly and explicitly close our channels all the way down.
ReqRep pattern will only accept OK and ERR events.

This mostly for pretty symmetry with the ReqStream.
Open pandora box: allow hooks for patterns
wip