Dc calib work (#428)

* remove optional flag dc_1hit, since ndata==1 cut was made a requirement for good track

* remove useless method printInitVar() :: remove useless variable dir_log_name

* remove pintInit() method from main_calib.C :: rename offset to tdc_offset

* Added SetTdcOffset() method to initialize the tdc offsets values independently of the event loop, and save some lines of coding

* incorporated ApplyTZeroCorrection() Method into the EventLoop() Method, with an oprional parameter. This way, there will be a single event loop in the entire code

* removed un-necessary ndata_wirenum variable. Removed pid_hadron optional flag, removed h(p)EL_CLEAN tdcTime cut since it is too restrictive, and cerenkov/calorimeter cuts can be used instead

* added chamber1/2 hit counters to require at least 5/6 planes hit per event per chamber as critereon for good event

* Added option to EventLoop() method to fill Uncorrected times