Updated Clock Routines

Clock hands now colored by using the original black images as a mask.
Jim's 24 hour clock now looks like a regular 24 hour clock. The code to
draw the full 24 hour clock (the odd one) is still there. If hourCount
is set to 24 it will be drawn that way… Added hand color picker to demo
window. Fixed Second and Hour hands images to stay centered during
rotation.