notmuch: update to 0.15.2
pythonPackages.alot: update to 0.3.4 (and stable revision)
pythonPackages.httplib2: update to 0.8
pythonPackage.flake8: update to 2.0

flake8 is not depending on pyflakes, mccabe, pep8 which were also updated or added.
pythonPackage.turses: update to 0.2.13