Add some missing keywords for Arduino (#645)
Add some missing keywords for Arduino (#645)

This adds the following keywords:

*  `CRGBArray`
*  `clearData`
*  `setMaxPowerInMilliWatts`
*  `setMaxPowerInVoltsAndMilliamps`
*  `setMaxRefreshRate`

This fixes #642.
FastLED/FastLED,remspoor/FastLED,PaulStoffregen/FastLED,FastLED/FastLED,PaulStoffregen/FastLED,FastLED/FastLED,remspoor/FastLED,FastLED/FastLED,PaulStoffregen/FastLED