o pkg/ptracers: new version of ptracers pickup:   read meta file and write only fields which are needed to restart.   ( same logic as main pickup file ; also using pickupStrictlyMatch )
o pkg/ptracers: new version of ptracers pickup:
  read meta file and write only fields which are needed to restart.
  ( same logic as main pickup file ; also using pickupStrictlyMatch )

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