Reorganized the example locations and names.
Removed various now realized ideas from the in-sources todo list.
Made support for hidden input (password prompt) conditional for the C level. Tcl level automatically adapts.
Fix bug in cmdloop. Do not try to dispatch the empty line from a ^C abort.
Made the examples proper scripts. Stripped each to their core, what they demonstrate.
Made them executable.
Tweaked the documentation (guides) a bit. Regenerated embedded docs.