HTML email templates: Outlook: center action button The rendering of HTML emails in Outlook is very restricted and based on old Internet Explorer versions (more or less the same rendering as in Microsoft Word). To make the Kallithea emails look the same as in the browser, some adaptations are needed. One of the problems is that the action button is not centered. An extra <center> tag solves this issue.

# requirements.txt file for use as "pip install -r requirements.txt" as a
# readthedocs compatible alternative to "pip install -e ." which is a working
# alternative to "setup.py develop" which doesn't work with Mercurial 3.7
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