Improve docs #303

	name: AbiPy linting

	on: [push, pull_request]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	max-parallel: 4
	matrix:
	python-version: [3.7]

	steps:
	- uses: actions/checkout@v1
	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v1
	with:
	python-version: ${{ matrix.python-version }}
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	- name: Lint with pycodestyle
	run: \|
	pip install pycodestyle
	pycodestyle abipy
	#- name: Lint with mypy
	# run: \|
	# pip install mypy
	# mypy abipy
	- name: Lint with flake8
	run: \|
	pip install flake8
	# stop the build if there are Python syntax errors or undefined names
	flake8 --count --show-source --statistics abipy
	# exit-zero treats all errors as warnings.
	#flake8 --count --exit-zero --max-complexity=20 --statistics abipy
	#- name: Lint with pylint
	# run: \|
	# pip install pylint
	# # stop the build if there are Python syntax errors or undefined names
	# pylint --exit-zero abipy

Provide feedback