g_sham needs more documentation
-map and -mdata inputs are not discussed in the help text or any code comments.
It would be useful if there was a suggestion in the documentation that the log file contains an ordered set of indices of energy minima that are useful for going and looking at low-energy structures, after using trjconv -sub bindex.ndx.
I'd assign this to David van der Spoel, who seems to have written g_sham, but he's not a member of this project.
Removed undocumented -map and -mdata options from g_sham.
Both options and code were completely undocumented, and
nobody seemed interested in helping document them for the
last two years, so for now they are gone.