add ability to fetch recipes like in chef-solo when using local-mode

When using local-mode sometimes good to able to fetch recipes tarball,
like chef-solo.

Signed-off-by: Vasiliy Tolstov <v.tolstov@selfip.ru>
I'd consider raising an error if `--recipe-url` is set and local mode is not, since it doesn't do anything anyway it'd be a convenient occasion to point out to the user that the flag doesn't work outside of localmode, in case they didn't read that far.