Control up to 32 servos without external hardware.

History:
Version 1 - - initial concept
Version 2 - (03-08-2006) - Beta release
Version 3 - (11-04-2007) - Improved servo resolution to 1uS
Version 4 - (05-03-2009) - Ability to disable a servo channel
and remove channel preset requirement
Version 5 - (05-11-2009) - Added servo speed ramping
Version 6 - (07-18-2009) - Fixed slight timing skew in ZoneLoop
and fixed overhead timing latency in
ZoneCore
Version 7 - (08-18-2009) - Fixed servo jitter in ramping
function when servo reached it's
target position.