Add magnitude function #38

	name: Build documentation

	on: [pull_request, push]

	jobs:

	docs:

	runs-on: ubuntu-latest

	env:
	GITHUB_PAT: ${{ secrets.GITHUB_TOKEN }}

	steps:

	- uses: actions/checkout@v2.3.4

	- run: \|
	sudo apt install doxygen graphviz -y

	- run: \|
	cd doc/
	python gen_mainpage.py
	doxygen

	- run: \|
	cd doc/html
	git init
	touch .nojekyll
	git add -A
	git config --local user.email "action@github.com"
	git config --local user.name "GitHub Action"
	git commit -m 'deploy'

	- uses: ad-m/github-push-action@v0.6.0
	with:
	github_token: ${{ secrets.GITHUB_TOKEN }}
	branch: gh-pages
	force: true
	directory: ./doc/html

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