Code review comment for lp://staging/~elachuni/txamqp/heartbeat-loopingcalls

Hi Anthony, sorry for the delay. Thank you very much for your patch.

> This is a branch that implements heartbeat frames using LoopingCall, per
> Esteve's suggestion.

I modified it a bit (lp:~esteve/txamqp/heartbeat-loopingcalls):

- added configurable heartbeats and client classes in testcases, so overriding connect and setUp is not needed, making HeartbeatTests a bit shorter
- re-added lastSent and lastReceived from your original patch. I didn't realize it at first, sorry, but now I think it's a great idea for accounting purposes

What do you think of it?

Thanks for your continuing contributions!