The non-interactive detection does not work when called from emacs
magit. Also we'd like to force git-good-commit to commit a message, like
when doing interactive.

So added logic to detect whether we are inside emacs and that looks in
the comment section of the commit message if there is somewhere a

   # gcc: y

defined as comment and if, then it commits anyway. Otherwise it exits
with an error message and also explaining what to do in case of forcing
the commit.