Discourage (prevent?) use of push --force

[salcode]

While we have added aliases to make it easier to use push --force-with-lease instead of push --force (see both #10 and #71), I would like go so far as to prevent push --force.

I've not determined a way to do this with a git alias (since I don't see a way to map a current command, i.e. git push, to something else).

I think the best route may be to create a bash script that runs in place of git. The script would listen for push --force and intervene in that situation, otherwise it would pass along all commands to git.

[salcode]

I'm testing out some code to add this git push --force prevention behavior. It is on branch sf/prevent-push-force-94.

I'll use it in my everyday use for a bit and if I'm happy with it, I'll create a PR to merge this functionality.