create-branch allows for preference for remote option

[btmurrell]

No description provided.

[spacewander]

@btmurrell
Will you address the two remain issues - fixing the edge case and adding two more example? Thanks!

[btmurrell]

@spacewander -- now that i think this PR is complete, i just noticed in git-changelog, this command is using git config changelog.OPTION for preferences. that is, there is a precedent for preferences in the git-extras commands... and it does not prefix with git-extras. perhaps the git-extras namespacing is superfluous? i think continuity among all commands would be best.... i'm happy to remove the namespace.

[spacewander]

@btmurrell
Thanks for your report. I think adding git-extras prefix is better. But for backward compatibility, if nobody complains, we won't change it.

[btmurrell]

ok, @spacewander. i will squash now.

[spacewander]

@btmurrell
Will you squash the commit so that I can merge it? Thanks!

[btmurrell]

Sorry @spacewander -- i tried to squash earlier, but did the push wrong. did it this time, but got it to two commits. botched, but hopefully clean enough.

[spacewander]

@btmurrell
Merged. Thank you!