- Switch requirements-tests-py3.txt to use mypy GitHub master.
- Exclude .venv{2,3} (suggested in README.md) in .flake8 and .gitignore.
- Update instructions in README.md to be working.
- Remove runtests.sh script and mentions of it -- I can't get it to work
and the three steps are easily run by hand.
This simplifies running flake8 tests and reduces the amount of F821 errors
reported (flake8-pyi enables support for forward references in *.pyi files).
The error code is left disabled until I clean up the remaining issues.
Ran both by Travis and locally. There's some setup required, README updated.
A few important Flake8 checks are still disabled, we're going to enable them as
soon as the stubs are fixed and we can reliably run Flake8 locally with Python
3.6.
