Returns the value in the same order it is set

[makermelissa]

Fixes #9. Tested with:

import board
import adafruit_ws2801

odata = board.D5
oclock = board.D6
numleds = 25
bright = 1.0
leds = adafruit_ws2801.WS2801(oclock, odata, numleds, brightness=bright, auto_write=True)

>>> leds[0] = (255, 0, 0)
>>> leds[0]
(255, 0, 0)
>>> leds[0:3] = ((255, 0, 0), (0, 255, 0), (0, 0, 255))
>>> leds[0:3]
[(255, 0, 0), (0, 255, 0), (0, 0, 255)]

[kevinjwalters]

Looking back at how this happened, I would have based this off code like https://github.com/adafruit/Adafruit_CircuitPython_DotStar/blob/7997057de145b9900426379772f46718bd563529/adafruit_dotstar.py which uses a B,G,R order, hence the reversal.

I changed that to R,G,B for the ordering required for the WS2801 LEDs I had but must have not tested reading back the values!