While Tia was in town, we wanted to run the code using (1) the GEANT4 simulated data produced by Valentina for the water phantom using the 5 stage calibration data and (2) the experimental catphan data from Tia.  Unfortunately, these data sets use a newer data format than the data sets the program was designed to use, so the ability to read data format Version 0 had to be added.  Since the program is designed to be able to read a portion of a file in addition to reading it in its entirety and Version 0 does not provide data for individual histories individually, the modifications were nontrivial and required modification of the program structure.  With only one night remaining on Tia's trip, these changes were made hastily and the code was left fairly fragmented, but the ability to read Version 0 data was successfully implemented.

- Functions added to count and store the number of histories in each file and to iteratively read the input data, restricted to all or none of a file at a time for now due to absence of individual history data
- Added functions added by duplicating existing function, modifying it them appropriately, and naming them by adding "_v0" to end of original function name
- History counting function added to read Version 0 data by modifying the existing function to read number of histories in each file from header instead of counting them
- Iterative data reading function added to read Version 0 data files 1 at a time for now; could read multiple files by modifying MAXIMUM_GPU_HISTORIES but any file read must be read in entirety.