PBL height assimilation

[gmao-yzhu]

This effort is to enable PBL height assimilation in the GEOS system.

[gmao-yzhu]

The following code changes have been inserted by hand into the git feature/yzhu/PBL_height:

| src/Applications/GSI_App/GSI_GridComp.rc.tmpl
| src/Applications/GSI_App/GSIsa_Gaussian.F90

| GMAO_hermes/dyn_iupd.F90
| GMAO_hermes/m_dyn.f90
| GMAO_hermes/m_dynp.F90

| GEOSaana_GridComp/GEOSgsi_Coupler/cplr_ensemble.F90
| GEOSaana_GridComp/GEOSgsi_Coupler/geos_StateIO.F90
| GEOSaana_GridComp/GEOSgsi_Coupler/geos_pertState.F90
| GEOSaana_GridComp/GEOSgsi_Coupler/geos_pertStateIO.F90
| GEOSaana_GridComp/GSI_GridComp/GSI_GridCompMod.F90
| GEOSaana_GridComp/GSI_GridComp/compute_qvar3d.f90
| GEOSaana_GridComp/GSI_GridComp/control2model.f90
| GEOSaana_GridComp/GSI_GridComp/control2model_ad.f90
| GEOSaana_GridComp/GSI_GridComp/ensctl2model.f90
| GEOSaana_GridComp/GSI_GridComp/ensctl2model_ad.f90
| GEOSaana_GridComp/GSI_GridComp/ensctl2state.f90
| GEOSaana_GridComp/GSI_GridComp/ensctl2state_ad.f90
| GEOSaana_GridComp/GSI_GridComp/hybrid_ensemble_isotropic.F90
| GEOSaana_GridComp/GSI_GridComp/inc2guess.f90
| GEOSaana_GridComp/GSI_GridComp/intpblh.f90
| GEOSaana_GridComp/GSI_GridComp/m_berror_stats.f90
| GEOSaana_GridComp/GSI_GridComp/m_pblhNode.F90
| GEOSaana_GridComp/GSI_GridComp/prewgt.f90
| GEOSaana_GridComp/GSI_GridComp/prt_guess.f90
| GEOSaana_GridComp/GSI_GridComp/read_obs.F90
| GEOSaana_GridComp/GSI_GridComp/read_pblh.f90
| GEOSaana_GridComp/GSI_GridComp/setuppblh.f90
| GEOSaana_GridComp/GSI_GridComp/stppblh.f90