Led update functions no longer return a colorized array. Colorizing is
now done in led_visualization. It makes more sense for the led_update_X
functions to return 1D brightness arrays and then to apply color
afterwards. This should also improve performance somewhat. Also added a
new function leak_saturated_pixels() which allows saturated colors (>255
value) to leak into the adjacent color channels
Led update functions now return an array of pixel values instead of
updating the LED strip directly. This change makes it possible to
combine the effects of different LED update functions before updating
the LED strip. The function responsible for updating the LED strip is
led_visualization()
