Add isotropic Damping from OpenFoam 8 to OpenFoam 6

src/fvOptions/cellSetOption src/fvOptions/interRegionOption src/fvOptions/sources/derived/damping/damping src/fvOptions/sources/derived/damping/isotropicDamping src/fvOptions/Make

defineTypeNameAndDebug(damping, 1);

change dimensionedScalar(lambda_.dimensions(), scale_.valid() ? 0 : 1) to dimensionedScalar("zero",lambda_.dimensions(), scale_.valid() ? 0 : 1)

cellSetOption/cellSetOption.C cellSetOption/cellSetOptionIO.C interRegionOption/interRegionOption.C interRegionOption/interRegionOptionIO.C damping/damping.C isotropicDamping/isotropicDamping.C LIB = $(FOAM_USER_LIBBIN)/libfvOptionsDamping

EXE_INC =
-I$(LIB_SRC)/finiteVolume/lnInclude
-I$(LIB_SRC)/meshTools/lnInclude
-I$(LIB_SRC)/sampling/lnInclude
-I$(LIB_SRC)/thermophysicalModels/solidThermo/lnInclude
-I$(LIB_SRC)/thermophysicalModels/basic/lnInclude
-I$(LIB_SRC)/thermophysicalModels/specie/lnInclude \

LIB_LIBS =
-lfiniteVolume
-lsampling
-lmeshTools
-lturbulenceModels
-lcompressibleTurbulenceModels

add fvOptions file to the constant add libs (

"libfvOptionsDamping.so"

); to system/controlDict file