[Merge] lp:~abompard/mailman/import21 into lp:mailman

[Aurélien Bompard]

Another thing, it contains a fix on mailman.app.templates (and the associated test case) to expect templates to be UTF-8 encoded, as discussed on the mailing-list.
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https://code.launchpad.net/~abompard/mailman/import21/+merge/192146
Your team Mailman Coders is requested to review the proposed merge of lp:~abompard/mailman/import21 into lp:mailman.