RGB hue sweep

[FantomXR]

It seems that I've got it working. I changed in ws2812.c this line

#define WS2812_BUFFER_SIZE      (((WS2812_NUM_LEDS+2)*24)) // +2*24 to insert the RESET frame

to

#define WS2812_BUFFER_SIZE      (((WS2812_NUM_LEDS+2)*24)+200) // +2*24 to insert the RESET frame

because of the 300us reset, the 2017 WS2812B need.

The LEDs are now working. I didn't do a mass-test, but it looks promising.