Add github actions for CI

- When a new PR is submitted, autoformat code with autopep8 and remove
  commented out code
- After reformatting, commit back to the pull request
- When reformatted code has been committed, lint it with pycodestyle

On github side we will
- Require all changes to be submitted as PRs
- Require all CI checks to pass before merging PRs

This change partially-fixes #1 and fixes #10

.editorconfig

@@ -0,0 +1,8 @@
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = space
+indent_size = 4

.github/workflows/lint.yml

@@ -0,0 +1,47 @@
+name: Lint & reformat
+
+on:
+  pull_request:
+    branches: ["master"]
+
+  workflow_dispatch:
+
+jobs:
+  reformat:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+          cache: 'pip'
+          cache-dependency-path: |
+            **/requirements*.txt
+      - name: Install pip packages
+        run: python3 -m pip install --upgrade autopep8 pycodestyle eradicate
+      - name: Run autopep8
+        run: autopep8 --in-place -aa -r .
+      - name: Remove commented out code
+        run: eradicate --in-place ./**/*.py
+      - name: Push back to repo
+        uses: actions-go/push@v1
+        with:
+          author-email: github-actions[bot]@users.noreply.github.com
+          author-name: Reformat action
+          create-commit: true
+          commit-message: "Reformatted code and removed commented-out code"
+  lint:
+    runs-on: ubuntu-latest
+    needs: reformat
+    steps:
+      - uses: actions/checkout@v3
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.9'
+          cache: 'pip'
+          cache-dependency-path: |
+            **/requirements*.txt
+      - name: Install pip packages
+        run: python3 -m pip install --upgrade pycodestyle
+      - name: Run pycodestyle
+        run: pycodestyle --show-source --show-pep8 ./**/*.py

setup.cfg

@@ -0,0 +1,4 @@
+[pycodestyle]
+max-line-length = 120
+statistics = True
+