These were related to a) scope of some variable declarations, and b) use
of pre-increment vs. post-increment of non-primitive types (this has a
slight performance hit due to the way that pre- vs. post-increment
operators are overloaded in C++.

Also cleaned up a few places where initialized variables were not being
used.

  Use HALLC_MODS in make file to turn on Hall C changes in Podd.
  Remove unneeded and now broken includes of THaDB.h.

Use DBRequest inside of loops over planes, using Form
to construct variables names that have the plane lable in them
(e.g. 1x, 1y, 2x, 2y)

prepended to all variables in the DBRequest list.

detector parameters from the gHcParms (THcParmList).

use the run number to determine which parameter and map files to use.

string variables from the Hall C style parameter files.  String
variables are loaded into a THaTextvars object that is held in the
THcParmList object.  PrintFull will now print all the string variables
as well as the numerical variables.  Added GetString, AddString and
RemoveString methods to access and modify the string variables.

that includes a class to read CTP style parameter files.