ENH: have ptscotch
ptscotch - compiles into ptscotchDecomp. All thirdparty decompositionMethods now moved out of decompositionMethods so add them explicitly to link line for programs that need them (decomposePar, snappyHexMesh etc.)
ptscotch - compiles into ptscotchDecomp. All thirdparty decompositionMethods now moved out of decompositionMethods so add them explicitly to link line for programs that need them (decomposePar, snappyHexMesh etc.)