setup: do like TurboGears2 and don't support WebOb 1.8 TurboGears2 2.3.12 has been released and made it clear they don't support WebOb < 1.8.0 - https://github.com/TurboGears/tg2/commit/1aee68f1239c76cabe945aa50ca1f7e7afea6842 . A plain "pip install -e ." would obey the Kallithea setup.py and install WebOb 1.8.0, but fail at runtime with: (WebOb 1.8.0, Requirement.parse('WebOb<1.8.0,>=1.2'), set(['TurboGears2']))

# 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
.