Merge pull request #264 from siddacious/add_bno08x_rvc

adding the ez-pz UART-RVC library for the BNO08x sensors

Author: siddacious

.gitmodules

@@ -718,6 +718,9 @@
 [submodule "libraries/helpers/pixel_framebuf"]
 	path = libraries/helpers/pixel_framebuf
 	url = https://github.com/adafruit/Adafruit_CircuitPython_Pixel_Framebuf.git
+[submodule "libraries/drivers/bno08x_rvc"]
+	path = libraries/drivers/bno08x_rvc
+	url = https://github.com/adafruit/Adafruit_CircuitPython_BNO08X_RVC.git
 [submodule "libraries/helpers/airlift"]
 	path = libraries/helpers/airlift
 	url = https://github.com/adafruit/Adafruit_CircuitPython_AirLift.git

docs/drivers.rst

@@ -294,6 +294,7 @@ Motion relating sensing including ``acceleration``, ``magnetic``, ``gyro``, and
 
     ADXL34x 3 Axis Accelerometer <https://circuitpython.readthedocs.io/projects/adxl34x/en/latest/>
     BNO055 Accelerometer, Magnetometer, Gyroscope and Absolution Orientation <https://circuitpython.readthedocs.io/projects/bno055/en/latest/>
+    BNO08X_RVC Simple UART Heading Library <https://circuitpython.readthedocs.io/projects/bno08x_rvc/en/latest/>
     FXAS21002C Gyroscope <https://circuitpython.readthedocs.io/projects/fxas21002c/en/latest/>
     FXOS8700 Accelerometer <https://circuitpython.readthedocs.io/projects/fxos8700/en/latest/>
     GPS Global Position <https://circuitpython.readthedocs.io/projects/gps/en/latest/>