def add_repo(repo, overwrite = false)
      raise ArgumentError, "Repo must be of type Gitolite::Config::Repo!" unless repo.instance_of? Gitolite::Config::Repo
      @repos[repo.name] = repo
    end
def add_repo(repo, overwrite = false)
      raise ArgumentError, "Repo must be of type Gitolite::Config::Repo!" unless repo.instance_of? Gitolite::Config::Repo
      @repos[repo.name] = repo
    end
TODO: merge repo unless overwrite = true