Merge pull request #110 from adafruit/stemma_i2c

Added commented out board.STEMMA_I2C with explanation

Author: evaherrada

examples/ht16k33_animation_demo.py

@@ -14,6 +14,7 @@
 
 #   Initialize the I2C bus
 i2c = board.I2C()  # uses board.SCL and board.SDA
+# i2c = board.STEMMA_I2C()  # For using the built-in STEMMA QT connector on a microcontroller
 display = Seg14x4(i2c, auto_write=False)
 #   Brightness of the display (0 to 15)
 display.brightness = 0.3

examples/ht16k33_segments_14x4_demo.py

@@ -9,7 +9,7 @@
 # Display connected to STEMMA QT connector.
 display = segments.Seg14x4(board.STEMMA_I2C())
 # Display connected to I2C pins.
-# display = segments.Seg14x4(board.I2C())
+# display = segments.Seg14x4(board.I2C())  # uses board.SCL and board.SDA
 
 # This section displays four 0's across the display. The code shows four
 # different ways to use the set_digit_raw function. Each is labeled below.