dd cost to final cost function contribution on a per tile base  (instead of adding to global fc); this involve replacing >           fc = fc with <           tile_fc(bi,bj) = tile_fc(bi,bj) in 6 places.
dd cost to final cost function contribution on a per tile base
 (instead of adding to global fc); this involve replacing
>           fc = fc
with
<           tile_fc(bi,bj) = tile_fc(bi,bj)
in 6 places.

altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h,altMITgcm/MITgcm66h