Don't prompt the user for unknown hosts. This gets in the way when running git commands and not worth doing anyways since we only connect to localhost.
Delete the gitolite-admin repository if it's present before checking it out during the setup phase. Just in case a previous run failed.
Add an option to not manage gitolite3 repositories through this module. This is useful if you plan on using an external tool (like Redmine) to manage repositories.