[PATCH Cogito] Use cg-commit -E to invoke editor and always commit

Hi Petr,

the attached patch introduces the -E parameter to cg-commit and then
uses it in cg-init. If you use -E instead of -e the editor is invoked
and it will do the commit even it the default commit messages has not
been changed.

Regards

Marcel


Signed-off-by: Marcel Holtmann <marcel@holtmann.org>