[Telepathy] file transfer spec comments

[Xavier Claessens]

> * Emitting TransferredBytesChanged should probably have some indication
> of how often it should happen, in case some keen CM ends up emitting one
> per byte transferred. I'm also a bit suspicious as to whether we need
> this - is it so likely that one client will initiate a transfer and stay
> around feeding bytes to the CM, but not be able to know how many bytes
> it's written?

I think nautilus could be doing the file transfer and the FT channel
handler could be displaying the progress. That's what empathy does, we
have a dialog showing all FT progress in a similar way than epiphany.

Xavier Claessens.