Incorrect charset for the Europython mailing list

The EP mailing list is configured so that it has:

Content-Type: text/plain; charset="us-ascii"

while the footer has:
EuroPython 2014 \x96 Berlin, 21th\x9627th July

Notice the two \x96 characters.  The intent is almost certainly to have those
interpreted in the windows-1252 charset, where they mean an en-dash.

But in us-ascii, this is an illegal character.  And my mailer complains 
bitterly about the problem.

So it looks like we need to fix 2 things.  The first is to change the charset
from "us-ascii" to something more reasonable, especially since most European 
languages do not fit into ascii -- utf-8 perhaps?

And the second thing is to change the footer text to have whatever is an
en-dash in whatever charset we decide to use.

Are there any reasons not to move to utf-8 ?

Laura

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