updated README

Author: sommersoft

README.rst

@@ -10,9 +10,12 @@ Introduction
     :target: https://discord.gg/nBQh6qu
     :alt: Discord
 
-VC0706 serial TTL camera module.  Allows basic image capture and download of
-image data from the camera over a serial connection.  See examples for demo
-of saving image to a SD card (must be wired up separately).
+.. image:: https://travis-ci.org/adafruit/Adafruit_CircuitPython_VC0706.svg?branch=master
+    :target: https://travis-ci.org/adafruit/Adafruit_CircuitPython_VC0706
+    :alt: Build Status
+
+CircuitPython module for use with the `VC0706 serial TTL camera <https://www.adafruit.com/product/397>`_.  Allows basic image capture and download of image data from the camera over a serial connection.  See examples for demo
+of saving image to a SD card (must be wired up separately) or internally.
 
 Dependencies
 =============
@@ -36,10 +39,49 @@ Contributions are welcome! Please read our `Code of Conduct
 <https://github.com/adafruit/Adafruit_CircuitPython_vc0706/blob/master/CODE_OF_CONDUCT.md>`_
 before contributing to help this project stay welcoming.
 
-API Reference
-=============
+Building locally
+================
+
+To build this library locally you'll need to install the
+`circuitpython-build-tools <https://github.com/adafruit/circuitpython-build-tools>`_ package.
+
+.. code-block:: shell
+
+    python3 -m venv .env
+    source .env/bin/activate
+    pip install circuitpython-build-tools
+
+Once installed, make sure you are in the virtual environment:
+
+.. code-block:: shell
+
+    source .env/bin/activate
+
+Then run the build:
+
+.. code-block:: shell
+
+    circuitpython-build-bundles --filename_prefix adafruit-circuitpython-vc0706 --library_location .
+
+Sphinx documentation
+-----------------------
+
+Sphinx is used to build the documentation based on rST files and comments in the code. First,
+install dependencies (feel free to reuse the virtual environment from above):
+
+.. code-block:: shell
+
+    python3 -m venv .env
+    source .env/bin/activate
+    pip install Sphinx sphinx-rtd-theme
+
+Now, once you have the virtual environment activated:
+
+.. code-block:: shell
 
-.. toctree::
-   :maxdepth: 2
+    cd docs
+    sphinx-build -E -W -b html . _build/html
 
-   api
+This will output the documentation to ``docs/_build/html``. Open the index.html in your browser to
+view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to
+locally verify it will pass.