Stars in the snow

Simple Arduino sketch that creates a continuously changing white 'background' on the LED-strip and animates occasional bright fading spots. Vaguely similar (really?) to twinkling stars on a snowy background.
Reduced background flickering

The background brightness changes are now changing to a set number of levels, rather than a +/- 1 every update interval. This makes the background change in a slightly less jarring way.

Also fixed a possible bug where the background and highlight brightness would go over 127 and effectively overflow the max brightness that the strip can deliver, causing for unintended flickering as the output goes near-dark momentarily.

Added a good healthy amount of comments explaining the function of some of the constants that can be defined.
StarsInSnow, twinkling winterlights on the LPD8806 strip.
Merge branch 'master' of ../ChristmasLights