Add CONTRIBUTING, CI, and fix maps icons/tiles #1

	name: CI

	on:
	push:
	branches: [ master ]
	pull_request:
	branches: [ master ]

	jobs:
	build:
	runs-on: ubuntu-latest
	strategy:
	matrix:
	python-version: [3.10, 3.11]

	steps:
	- uses: actions/checkout@v4

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	if [ -f requirements-tests.txt ]; then pip install -r requirements-tests.txt; fi
	pip install -e .

	- name: Run tests
	run: pytest -q

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