ENH: faParkerFukushimaFoam: Restructuring to make sub-models user-selectable

applications/solvers/faParkerFukushimaFoam/createFaFields.H

applications/solvers/faParkerFukushimaFoam/createSubmodels.H

...ons/solvers/faParkerFukushimaFoam/faParkerFukushimaFoam.C

...s/solvers/faParkerFukushimaFoam/readTransportProperties.H

src/avalanche/Make/files

...ion/suspensionDepositionModel/suspensionDepositionModel.C

...ion/suspensionDepositionModel/suspensionDepositionModel.H

.../suspensionDepositionModel/suspensionDepositionModelNew.C

...FukushimaDeposition/suspensionParkerFukushimaDeposition.C

...FukushimaDeposition/suspensionParkerFukushimaDeposition.H

...ainment/ambientAnceyEntrainment/ambientAnceyEntrainment.C

...ainment/ambientAnceyEntrainment/ambientAnceyEntrainment.H

...ainment/ambientEntrainmentModel/ambientEntrainmentModel.C

...ainment/ambientEntrainmentModel/ambientEntrainmentModel.H

...ment/ambientEntrainmentModel/ambientEntrainmentModelNew.C

...rFukushimaEntrainment/ambientParkerFukushimaEntrainment.C

...rFukushimaEntrainment/ambientParkerFukushimaEntrainment.H

...nment/ambientTurnerEntrainment/ambientTurnerEntrainment.C

...nment/ambientTurnerEntrainment/ambientTurnerEntrainment.H

...nment/suspensionEntrainmentOff/suspensionEntrainmentOff.C