Addition of code linting would be nice

[golharam]

No description provided.

[miguelgrinberg]

You can lint the code yourself very easily:

> pip install flake8
> flake8 app/*
app/__init__.py:99:1: F401 'app.models' imported but unused
app/__init__.py:99:1: E402 module level import not at top of file
app/api/__init__.py:5:1: F401 'app.api.users' imported but unused
app/api/__init__.py:5:1: F401 'app.api.errors' imported but unused
app/api/__init__.py:5:1: F401 'app.api.tokens' imported but unused
app/api/__init__.py:5:1: E402 module level import not at top of file
app/auth/__init__.py:5:1: F401 'app.auth.routes' imported but unused
app/auth/__init__.py:5:1: E402 module level import not at top of file
app/errors/__init__.py:5:1: F401 'app.errors.handlers' imported but unused
app/errors/__init__.py:5:1: E402 module level import not at top of file
app/main/__init__.py:5:1: F401 'app.main.routes' imported but unused
app/main/__init__.py:5:1: E402 module level import not at top of file
app/models.py:218:57: E712 comparison to False should be 'if cond is False:' or 'if not cond:'
app/models.py:223:57: E712 comparison to False should be 'if cond is False:' or 'if not cond:'