Merge pull request #4 from brentru/fix-autodoc

fix autodoc

Author: kattni

conf.py

@@ -15,6 +15,11 @@
     'sphinx.ext.viewcode',
 ]
 
+# Uncomment the below if you use native CircuitPython modules such as
+# digitalio, micropython and busio. List the modules you use. Without it, the
+# autodoc module docs will fail to generate with a warning.
+autodoc_mock_imports = ["adafruit_bus_device", "micropython"]
+
 intersphinx_mapping = {'python': ('https://docs.python.org/3.4', None),
                        'CircuitPython': ('https://circuitpython.readthedocs.io/en/latest/', None)}