Building shower files from the simulated data:
16/08/05 Test 8: Test on two different AIRES showers.
11/08/05 Test 7: Included pair-production from photons.
11/08/05 Test 6: Adjusted timing offsets slightly.
11/08/05 Test 5: Added clock-tick offsets.
09/08/05 Test 4: Fixed conversion from time-over-threshold
to intensity.
09/08/05 Test 3: First pass at writing a shower file.
09/08/05 Test 2: Test on shower centered at (-200,-200).
09/08/05 Test 1: Calculating hit intensity from
the time over threshold.