bugfix private_token not always required
add --no-remote doc
add --no-remote getopt option
no_remote_set option added to config.sh
no_remote_set preflight check
no_remote_set logic added to mirrors

All mirrors support local only mirroring now when adding
repositories.

Fixed messages going to stdout when it should be going to stderr.

Fixed preflight messages going to stderr when it should be going
to stdout.
delete_mirror.sh updated for noremote git setting
update_mirror.sh updated for noremote git setting
Merge branch 'feature/no-remote' into development