Introduced a function to skip to the start position of a list.  Used that function in the nsubstitute functions.
Introduced a function to skip to the start position of a
list.  Used that function in the nsubstitute functions.

vtomole/SICL,clasp-developers/SICL,vtomole/SICL,vtomole/SICL,vtomole/SICL,clasp-developers/SICL,clasp-developers/SICL,clasp-developers/SICL