Fix A5 support on the leonardo
Merge branch 'FastLED3.1' of https://github.com/FastLED/FastLED into FastLED3.1
We only need to see the FastLED version warning once, thank you very much
Shut off version warning in color palettes
Add configuration option for allowing/disallowing interrupts.  Disable by default for AVR, block out AVR implementation of wiring functions.
Prefix config defines with FASTLED_ to make sure we don't conflict with anything else.
Add ((weak)) attribute to forward declaration of user-supplied XY function
Fix off-by-one error in array blend functions.
Fix for lerp8by8 and lerp16by16 when rangestart and rangeend are inverted.
merge with upstream