Support for PL9823

[f0x52]

Would be nice to have an option to use the badge to control PL9823 LED's, which are quite similar to the WS2812

[annejan]

From what I've read here it should just work™ with the current code, just like the WS2812 . .

[basvs]

I understood there were two issues:

• Compared to the WS2812, the red and green are switched. (so I guess this PL9823 sends its data as R, G, B instead of G, R, B)
• The timing is not correct for the PL9823. (I haven't seen any specs. I guess the 0.3ųs/0.9ųs and 0.6ųs/0.6ųs are too fast for this chip)