Permit words for use as section keys.

This is an experimental idea to allows words for section keys.  So, Forms.Radiobuttons, etc.  You could also mix/match like Forms.1 to isolate numbering changes.

It's possible it should require a flag to KSS parser to enable this mode.

It's also possible this is crazy.  I kind of like the idea because then I think you can reorder (or not sweat the ordering when starting out) without having to edit toplevel numbers every time you shuffle.