ENH: Updated construction/retrieval of gravity field. See #1094

...onFoam/chtMultiRegionSimpleFoam/fluid/createFluidFields.H

...oam/chtMultiRegionSimpleFoam/fluid/setRegionFluidFields.H

...ingEulerFoam/phaseSystems/phasePair/phasePair/phasePair.C

...odels/KocamustafaogullariIshii/KocamustafaogullariIshii.C

...wallBoilingSubModels/departureFrequencyModels/Cole/Cole.C

...m/diameterModels/IATE/IATEsources/IATEsource/IATEsource.C

...m/diameterModels/IATE/IATEsources/IATEsource/IATEsource.C

...Models/compressible/RAS/buoyantKEpsilon/buoyantKEpsilon.C

...aticPressure/phaseHydrostaticPressureFvPatchScalarField.C

...lds/derived/prghPressure/prghPressureFvPatchScalarField.C

...d/prghTotalPressure/prghTotalPressureFvPatchScalarField.C

...ure/uniformDensityHydrostaticPressureFvPatchScalarField.C

...veSurfacePressure/waveSurfacePressureFvPatchScalarField.C

...n/icoUncoupledKinematicCloud/icoUncoupledKinematicCloud.C

...fvOptions/sources/derived/buoyancyEnergy/buoyancyEnergy.C

src/fvOptions/sources/derived/buoyancyForce/buoyancyForce.C

...solidificationMeltingSource/solidificationMeltingSource.C

...solidificationMeltingSource/solidificationMeltingSource.H

...tabulatedAccelerationSource/tabulatedAccelerationSource.C

...AccelerationSource/tabulatedAccelerationSourceTemplates.C