Dc work (#134)

* -added a few lines of code to produce a weighted tzero data file
per wire basis, where the weight is by groups (ribbon cables)

* -started to add lines to read per-wire tzero parameter data file. (work in progress)

* -mofidied plane numbering in 'get_zero_param.C' to match the rest of the
calibration script plane numbering scheme

* -minor fix

* -script that reads a data file containing the per wire tzeros
-the tzero correction is applies on a wire-by-wire basis and the
wire drift times are added to produce the corrected plane drift times

* minor modifications to name of file being read

* -minor modifications to file name being read