Starting tuning on sorted distance comparator.
Added cutoff factor option for comparison.  Only plummed in for sorted distance comparator.
Added Ti and Sr elements.
Added tab to distance matrix printout which makes it much easier to read.
Testing new functionality that allows groups of structures to be compared.
Fixed couple of compilation issues.
Fixed major bug with to do with assiging wrong sized matrix.
Fixed another matrix related bug.
Changed stable comparison namespace to be a bit more intuitive and in keeping with conventions.
Merge branch 'comparator_tuning'
Tuned cutoff for sorted distance comparator somewhat.
Merge branch 'comparator_tuning'
Added option to reverse sort order produced by sinfo.