The directory scripts4all is for Jmol command script files (.spt) shared
by more than one chapter in the present tutorial.

Scripts shared by more than one tutorial could go in jtat/_sptutil.

In the template, scripts4all contains some sample scripts that are not
actually used, but could serve as models for custom colors (co_*.spt),
or for displaying disulfide bonds (ssbonds.spt).
