[Twisted-Python] seafelt uses twisted

[Andrew Bennetts]

Justin Warren wrote:
[...]
> 
> I recently ported all our old threaded code across to twisted and it's
> now even faster and more efficient, not to mention easier to debug. I
> think I now finally grok Deferreds, though I still struggle with Errback
> chains and Unhandled Deferred errors from time to time.

In case you're not aware of it, twisted.internet.defer.setDebugging(True) can be
helpful with understanding unhandled deferred errors.

-Andrew.