COMP: add forward declarations for friend operators (eg, gcc-4.9)

...icMeshing/coordinateModification/coordinateModification.H

.../anisotropicMeshing/coordinateModification/planeScaling.H

meshLibrary/utilities/containers/Lists/cellListPMG.H

meshLibrary/utilities/containers/Lists/faceListPMG.H

meshLibrary/utilities/containers/Lists/pointFieldPMG.H

...ties/meshes/polyMeshGen/boundaryPatch/boundaryPatchBase.H

...rary/utilities/meshes/primitives/meshSubsets/meshSubset.H

meshLibrary/utilities/meshes/primitives/partTet/partTet.H

...lities/octrees/meshOctree/meshOctreeCube/meshOctreeCube.H

...s/octrees/meshOctree/meshOctreeCube/meshOctreeCubeBasic.H

...ees/meshOctree/meshOctreeCube/meshOctreeCubeCoordinates.H

...ee/refinementControls/objectRefinement/objectRefinement.H

...tree/refinementControls/patchRefinement/patchRefinement.C

...tree/refinementControls/patchRefinement/patchRefinement.H

...lities/surfaceTools/meshSurfaceEngine/meshSurfaceEngine.H

...tilities/surfaceTools/meshSurfaceMapper/parMapperHelper.H