It incorporates improvements to the logic of COBCD-ST, including more robust handling of
REDEFINES and some 66/RENAMES capability.

COBCD-ST is significantly faster because of the elimination of a couple of O(N-squared)
constructions in the code.  For a program with 40,000 COBOL variables it is thirty times
faster.

COBCD-SFIX is faster by a factor of about six.

The Python cobcd.py has been altered to pick up the cross-reference VARIABLE_STRING much
faster than before.  A test program with 40,000 COBOL variables used to take 2.5 minutes to
read over the string, one character at a time.  Use of a different GDB command for looking
at string data got that down to 1.5 seconds.