Merge pull request #247 from siddacious/lis331

adding lis331

Author: kattni

.gitmodules

@@ -682,3 +682,6 @@
 [submodule "libraries/drivers/fona"]
 	path = libraries/drivers/fona
 	url = https://github.com/adafruit/Adafruit_CircuitPython_FONA.git
+[submodule "libraries/drivers/lis331"]
+	path = libraries/drivers/lis331
+	url = https://github.com/adafruit/Adafruit_CircuitPython_LIS331.git

docs/drivers.rst

@@ -299,6 +299,7 @@ Motion relating sensing including ``acceleration``, ``magnetic``, ``gyro``, and
     LIS2MDL 3-Axis Magnetometer <https://circuitpython.readthedocs.io/projects/lis2mdl/en/latest/>
     LIS3MDL 3-Axis Magnetometer <https://circuitpython.readthedocs.io/projects/lis3mdl/en/latest/>
     LIS3DH Accelerometer <https://circuitpython.readthedocs.io/projects/lis3dh/en/latest/>
+    LIS331HH and H3LIS331 3-Axis Accelerometers <https://circuitpython.readthedocs.io/projects/lis331/en/latest/>
     LSM303 Accelerometer and Magnetometer <https://circuitpython.readthedocs.io/projects/lsm303/en/latest/>
     LSM303 Accelerometer Only<https://circuitpython.readthedocs.io/projects/lsm303-accel/en/latest/>
     LSM303DLH Magnetometer Only<https://circuitpython.readthedocs.io/projects/lsm303dlh-mag/en/latest/>