Merge branch 'jc/a-commands-without-the-repo'

Commands that can also work outside Git have learned to take the repository instance "repo" when we know we are in a repository, and NULL when we are not, in a parameter. The uses of the_repository variable in a few of them have been removed using the new calling convention. * jc/a-commands-without-the-repo: archive: remove the_repository global variable annotate: remove usage of the_repository global git: pass in repo to builtin based on setup_git_directory_gently