Minor changes to get docs to compile correctly

Also, added Makefile back in to do local builds of the docs.

.gitignore

@@ -100,3 +100,7 @@ ENV/
 # mypy
 .mypy_cache/
 .idea
+*.bak
+machine.py
+utime.py
+_build

Makefile

@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line.
+SPHINXOPTS    =
+SPHINXBUILD   = python -msphinx
+SPHINXPROJ    = AdafruitSoundboardLibrary
+SOURCEDIR     = .
+BUILDDIR      = _build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)

README.rst

@@ -52,9 +52,9 @@ Then, create an instance of the :class:`~soundboard.Soundboard` class, like this
     sound = Soundboard('XB')
 
 I *highly* recommend you also attach the ``RST`` pin on the soundboard to one of the other GPIO pins on the MCU (pin
-`X11` in the example). Also, my alternative method of getting the list of files from the board is more stable (in my own
-testing) than the method built-in to the soundboard. Also, I like getting the debug output and I turn the volume down to
-50% while I'm coding. Doing all this looks like the following:
+``X11`` in the example). Also, my alternative method of getting the list of files from the board is more stable (in my
+own testing) than the method built-in to the soundboard. Also, I like getting the debug output and I turn the volume
+down to 50% while I'm coding. Doing all this looks like the following:
 
 ::
 

adafruit_soundboard.py

@@ -20,9 +20,6 @@
 # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 # THE SOFTWARE.
 """
-`adafruit_soundboard`
-====================================================
-
 This is a MicroPython library for the Adafruit Sound Boards in UART mode!
 
 This library has been adapted from the library written by Adafruit for Arduino,

api.rst

@@ -1,4 +1,8 @@
-.. automodule:: soundboard
+=====================
+`adafruit_soundboard`
+=====================
+
+.. automodule:: adafruit_soundboard
    :members:
 
    .. py:data:: SB_BAUD