This is interfering w/ my attempt to work for my employer today, so
try overcoming major annoyance and frequent ~20s slowdown in using
my work and personal todo list as I'm sick of it crashing.  I.e.,
better exception handling so it goes on/doesn't crash.
Fix bug of quotes being escaped twice, so line to long to store in group name
when creating a subgroup from quick group menu.
Reword prompt, and bugfix where it was showing the message too often:
"/home/lacall/proj/om/src/main/scala/org/onemodel/TextUI.scala".
Allow exclamation marks in name entries (failed previously: I think that
is some kind of command character to postgresql).
Revert "Allow exclamation marks in name entries (failed previously: I think that"
...because maybe it's not a pgsql thing but a readline (jline2) thing. Workaround
seems to be to leave a space after any exclamation mark ("!").

This reverts commit c715fa06bcf2c6061e9d1eaa9f8dde15f3b9387e.
Temporarily save a diff for changes contemplated once (in case useful
later because there's likely more future work to be done on that; though
there's a partial fix in place already).
Delete temporary file.
Refactoring: moving files into new packages.