contrib: contacts: add documentation
contrib: contacts: add documentation

Assuming that git-contacts may some day be promoted to a core git
command, the documentation is written and formatted as if it already
belongs in Documentation/ even though it presently resides in
contrib/contacts.

Signed-off-by: Eric Sunshine <8d6e34f987851aa599257d3831a1af040886842f@sunshineco.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git