Add code to THcHodoScope.cxx to store the focal plane time and number of paddle hits

used to determine focal plane time for each hodoscope plane.
Add code to THcScintillatorPlane:DefineVariables to write out
focal plane time, number of paddles hit that passed minimal TDc cut
and number of paddle hit that were used in determining the focal plane time.
Add calls to THcScintillatorPlane.h to Set and Get the focal plane time
and number of paddle hits used to determine focal plane time for each hodoscope plane.