ENH: Merge searchableSurface and indexedOctree volumeType

...backgroundMeshDecomposition/backgroundMeshDecomposition.C

...backgroundMeshDecomposition/backgroundMeshDecomposition.H

...Surfaces/cellSizeFunction/linearDistance/linearDistance.C

...olSurfaces/cellSizeFunction/linearSpatial/linearSpatial.C

...surfaceOffsetLinearDistance/surfaceOffsetLinearDistance.C

...ellSizeControlSurfaces/cellSizeFunction/uniform/uniform.C

...rfaces/cellSizeFunction/uniformDistance/uniformDistance.C

...alVoronoiMesh/conformationSurfaces/conformationSurfaces.C

...alVoronoiMesh/conformationSurfaces/conformationSurfaces.H

applications/utilities/surface/surfaceSubset/surfaceSubset.C

src/OpenFOAM/Make/files

...AM/algorithms/dynamicIndexedOctree/dynamicIndexedOctree.C

...AM/algorithms/dynamicIndexedOctree/dynamicIndexedOctree.H

...AM/algorithms/dynamicIndexedOctree/dynamicTreeDataPoint.C

...AM/algorithms/dynamicIndexedOctree/dynamicTreeDataPoint.H

src/OpenFOAM/algorithms/indexedOctree/indexedOctree.C

src/OpenFOAM/algorithms/indexedOctree/indexedOctree.H

src/OpenFOAM/algorithms/indexedOctree/treeDataCell.H

src/OpenFOAM/algorithms/indexedOctree/volumeType.C

src/OpenFOAM/algorithms/indexedOctree/volumeType.H