in the new package "timeave", replaces old diags/src/do_time_averages.F     add time-averaged ETA diagnostic
in the new package "timeave", replaces old diags/src/do_time_averages.F
    add time-averaged ETA diagnostic

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