[BioPython] one function, two behaivors

[Peter]

I wrote,
> As to why there are two ways, well, frankly the Bio.Transcribe and
> Bio.Translate code isn't very nice to use!   The Bio.Seq functions are
> much simpler.

Hmm - the tutorial is still using Bio.Transcribe and Bio.Translate at
the moment.   I could update the tutorial to use the Bio.Seq functions
for (back)transcription.  However, as I said in the last email,
Bio.Translate still has its uses - there is no way to do a "translate
to stop" with Bio.Seq for example.

Maybe Bug 2381 should be a priority for the next release AFTER the
imminent Biopython 1.46.  We can then use object methods in the
tutorial, which I personally would find much nicer to use.

http://bugzilla.open-bio.org/show_bug.cgi?id=2381

If you could have a look at the suggested changes on Bug 2381, I'd
welcome some feedback.

Peter