Add color config slots to be used in the status short-format when displaying local and remote tracking branch information. [jc: rebased on top of Peff's fix to 'git status' and tweaked the test to check both local and remote-tracking branch output] Signed-off-by: Stephen Kent <smkent@smkent.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>