Changed the correlated event triggering conditions.  Instead of the complicated searches in a window of 6

it is now restricted to a window of 4 and sorts the information based on channel number.  This aviods the
necessity to check to make sure you are subtracting the same PMT each time.  The main conditions are:
All 4 channels have to be present in the set of 4.  The average of the two bar's times has to be less then
10 clock tics
Only writes output tree for good events