added table diagram, and brief developer guide and deployment info for docs

docs/source/developer_guide.rst

@@ -0,0 +1,23 @@
+Developer Guide
+===============
+
+Installation
+------------
+
+To install the necessary dependencies for building the documentation and running unit tests, run the following command from the package root directory:
+
+.. code-block::
+
+    pipenv install --dev
+
+Documentation
+-------------
+If changes are made to the package structure or additional modules are created, you can update the Sphinx source ``cisticola.*.rst`` files by running the following command from the ``docs/`` directory:
+
+.. code-block::
+
+    pipenv run make apidoc
+
+Formatting
+----------
+Cisticola uses `black <https://github.com/psf/black>`_ to format source code.