Driving WS2811, WS2812 and other NeoPixel devices from ESP8266

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MarkusGritsch
I tried the code from the official Espruino WS2812 example: http://www.espruino.com/WS2811 replacing the calls to SPI by esp.neopixelWrite(), but I get the error
```
>esp.neopixelWrite(pin, arr);
Uncaught Error: Data must be an array.
 at line 1 col 27
esp.neopixelWrite(pin, arr);
                          ^
```
It would be nice if neopixelWrite would also take an Uint8ClampedArray or Uint8Array.

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