Added new methods to the THcRawAdcHit.

SConscript.py

src/HallC_LinkDef.h

src/SConscript.py

src/THcRawAdcHit.cxx

src/THcRawAdcHit.h

src/THcRawShowerHit.cxx

src/THcRawShowerHit.h

src/THcRawTdcHit.cxx

src/THcRawTdcHit.h