[GH-108] Replace README.rst with README.md (#109)

And update the readme to include more documentation.

.github/workflows/build-test.yml

@@ -1,4 +1,4 @@
-name: build-test
+name: build & test
 
 on:
   push:

.github/workflows/publish.yml

@@ -0,0 +1,28 @@
+name: Publish Python Package
+
+on:
+  release:
+    types: [published]
+
+jobs:
+  deploy:
+
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+    - name: Set up Python
+      uses: actions/setup-python@v2
+      with:
+        python-version: '3.x'
+    - name: Install dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install build
+    - name: Build package
+      run: python -m build
+    - name: Publish package
+      uses: pypa/gh-action-pypi-publish@27b31702a0e7fc50959f5ad993c78deac1bdfc29
+      with:
+        user: __token__
+        password: ${{ secrets.PYPI_API_TOKEN }}