Bug Fix:
In AccumulatePedestals method of THcAerogel.cxx class at line no. 461 it is:

Int_t adcneg = hit->fADC_pos;

but it should be:

Int_t adcneg = hit->fADC_neg;

This bug is fixed in this file.
Additio of new class THcCherenkov.cxx:
New THcCherenkov class is added and some changes are made to few files.
First 16000 evetns are analyzed with ENGINE and with hcana and then
compared the raw adc values of two PMTs of Cherenkov detector. All values
match with eachother.
Next step is to analyzer  more runs and compare other variables like
number photo electrons, good hits and other variables.