[Denemo-devel] Do not copy Denemo Directive objects!

[Richard Shann]

I have just fixed a bug with the cloning of Denemo directive objects
(things like rehearsal marks, double bars, most things that aren't notes
or rests): the implication is that if you copy and paste things in the
latest release you are in danger of getting a crash later (e.g. when
deleting).
Files saved and reloaded are safe, but be cautious with copy until we
have a new version out.

Richard