added setSat(255) for the StateUpdate

Thank you for putting together this plugin...I love it!  I did notice that "out of the box" the saturation is not set very high on my Hue bulbs.  I couldn't figure out why the colors were so faint.  We have lots of bright white lights in the office, so the colors were very difficult to see.

I played around with setting the saturation, and that seemed to be the trick.

Possible alternatives - add saturation/brightness as a field in Jenkins, and use 255 as the defaults.