Merge pull request #347 from dhalbert/radial_controller

Add radial_controller

Author: kattni

.gitmodules

@@ -857,3 +857,6 @@
 [submodule "libraries/drivers/uc8151d"]
 	path = libraries/drivers/uc8151d
 	url = https://github.com/adafruit/Adafruit_CircuitPython_UC8151D.git
+[submodule "libraries/helpers/radial_controller"]
+	path = libraries/helpers/radial_controller
+	url = https://github.com/adafruit/Adafruit_CircuitPython_Radial_Controller.git

docs/drivers.rst

@@ -204,6 +204,7 @@ Miscellaneous Helpers
     Mini ESP Tool (ESP chips loader) <https://circuitpython.readthedocs.io/projects/miniesptool/en/latest/>
     NeoKey <https://circuitpython.readthedocs.io/projects/neokey/en/latest/>
     OneWire <https://circuitpython.readthedocs.io/projects/onewire/en/latest/>
+    Radial Controller <https://circuitpython.readthedocs.io/projects/radial-controller/en/latest/>
     SD Card <https://circuitpython.readthedocs.io/projects/sd/en/latest/>
     SimpleIO <https://circuitpython.readthedocs.io/projects/simpleio/en/latest/>
     SimpleMath <https://circuitpython.readthedocs.io/projects/simplemath/en/latest/>