formats:
>>chng 98 Feb 2, xxx

major error - there is only one class of initialized variables.  they must be initialize
for every model.  this cannot occur in the definition of the variable, but must occur 
after the routine is entered.

=============================================================================

proper crash exit
		ShowMe();
		clos_units();
		puts( "[Stop in bidiag]" );
		exit(1);


==============================================================================

path 
in path.h
is saved in zerologic.c, called chDataPath[81] (null terminated)
lgDataPathSet indicates whether it is set

==============================================================================

to turn on function tracing, set DEBUG_FCN 

all physical constants are in physconst.h

charge transfer with hydrogen - all files in hchargtran.c

==============================================================================

#include "zonecnt.h"
zone number is ZoneCnt.nzone;

#include "itercnt.h"
iteration number is IterCnt.iter 

==============================================================================

trace keywords are in trace.h

=====================================================

input stream
cdRead stuffs input line ito input.chCardSav as commands are brought in
readr gets new command lines by calling readar
lines saved in input.h
#include "input.h"

cap'd version of input command in input.chCARDCAPS