IMPORTANT: Adjoint I/O update

[arango]

• Update the Adjoint model to write out ad_W. A new output variable ad_W_sol to save the current ad_W solution before it is zeroed out. In ad_ouput.F, we have:

  !
  !  Save current adjoint solution for IO purposes.
  !
        DO k=0,N(ng)
          DO j=JstrR,JendR
            DO i=IstrR,IendR
              ad_W_sol(i,j,k)=ad_W(i,j,k)
            END DO
          END DO
        END DO
  

  Many thanks to Brian Powell for bringing this IO issue to our attention for his adjoint sensitivity studies.

• Corrected tides_date.F to include missing module reference:

        USE strings_mod,   ONLY : FoundError
  

  Many thanks to John Warner for reporting this problem.

[arango]

Modified ad_set_avg.F to accumulate ad_W_sol instead of ad_W.