Merge pull request #426 from jepler/add-wave

Add new "wave" library

Author: kattni

.gitmodules

@@ -947,3 +947,6 @@
 [submodule "libraries/drivers/wii_classic"]
 	path = libraries/drivers/wii_classic
 	url = https://github.com/adafruit/Adafruit_CircuitPython_Wii_Classic.git
+[submodule "libraries/helpers/wave"]
+	path = libraries/helpers/wave
+	url = https://github.com/adafruit/Adafruit_CircuitPython_wave.git

docs/drivers.rst

@@ -194,6 +194,7 @@ Music, noisemakers, and more.
     MIDI <https://docs.circuitpython.org/projects/midi/en/latest/>
     Ring Tone Text Transfer Language (RTTTL) <https://docs.circuitpython.org/projects/rtttl/en/latest/>
     Waveform Generation <https://docs.circuitpython.org/projects/waveform/en/latest/>
+    Wave file I/O <https://docs.circuitpython.org/projects/wave/en/latest/>
 
 Miscellaneous Helpers
 ^^^^^^^^^^^^^^^^^^^^^^^