Minified file uses " " instead of unicode '\u00a0' for attrs.knobLabel

I had some issues where the knob label when no value was supplied appeared as Â.  I noticed that in the implementation that the default attrs.knobLabel =  '\u00a0';, however, in the minified version it is just a space " ".   I was able to resolve the issue by using the non-minified file, but you should make sure your minified version doesn't drop the unicode.
