Merge pull request #25 from adafruit/drivers-more

Update drivers.rst

Author: tannewt

docs/drivers.rst

@@ -5,5 +5,12 @@ These are drivers available in separate GitHub repos.
 
 .. toctree::
 
-    RGB Displays <http://micropython-rgb.readthedocs.io/en/latest/index.html>
+    RGB Displays <http://micropython-rgb.readthedocs.io/>
     Analog-to-digital converters: ADS1015 and ADS1115 <http://micropython-ads1015.readthedocs.io/>
+    Real-time Clock modules <http://micropython-urtc.readthedocs.io/>
+    TCS34725 Color Sensor <http://micropython-tcs34725.readthedocs.io/>
+    TSL2561 Light Sensor <http://micropython-tsl2561.readthedocs.io/>
+    PCA9685 Motor and Servo Controllers <http://micropython-pca9685.readthedocs.io/>
+    HT16K33 LED Matrices and Segment Displays <http://micropython-ht16k33.readthedocs.io/>
+    IS31FL3731 Charlieplexed LED Matrix <http://micropython-is31fl3731.readthedocs.io/>
+    MAX7219 LED Matrix <http://micropython-max7219.readthedocs.io/>