Tugboat: Provide configuration to switch between progress page and not

For local dev, the progress page does not work because it requires Tugboat to call a public facing URL.

It would be ideal if we can turn it off with configuration. While it may make it difficult to work on, we do have a dev server and can test patches there.

The downside of this is that it would just look like it was spinning until it finished.

My thoughts are the following:

1. Keep the current progress page intact, it will just look like it's spinning until it finishes

2. Add a new setting to turn off the callbacks, where we could have a "local mode" checkbox.

3. Update each of the Tugboat scripts to add conditions before the "wget" calls, the new setting would not perform any of the "wget" callbacks if the new configuration enabled "local mode"