o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics    and allow to use EVP solver. Change forward lab_sea: test both EVP    solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)
o pkg/seaice: change default (SEAICE_OPTIONS.h): use C-grid dynamics
   and allow to use EVP solver. Change forward lab_sea: test both EVP
   solver and LSR solver, and use C-grid dynamics (like lab_sea adjoint)

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