New CORRECT precise brightness timing code

See...

http://ognite.wordpress.com/2013/12/11/lighting-dim-leds-making-bit-banging-pwm-precise-to-a-single-cycle/
Switch to divide by 4 strategy

Padded the loop so that we could use more efficient /4 rather than /3.

See...
http://ognite.wordpress.com/2013/12/11/when-more-code-is-less-code/
Clean up GIT?