Merge remote-tracking branch 'origin/develop' into feature-alltoall

Conflicts:
	src/OpenFOAM/db/IOobjects/IOdictionary/IOdictionaryIO.C
	src/OpenFOAM/db/IOstreams/Pstreams/Pstream.H
	src/OpenFOAM/db/IOstreams/Pstreams/PstreamBuffers.C
	src/OpenFOAM/db/IOstreams/Pstreams/PstreamBuffers.H
	src/OpenFOAM/db/IOstreams/Pstreams/UPstream.C
	src/OpenFOAM/db/IOstreams/Pstreams/UPstream.H
	src/OpenFOAM/db/IOstreams/Pstreams/combineGatherScatter.C
	src/OpenFOAM/db/IOstreams/Pstreams/exchange.C
	src/OpenFOAM/db/IOstreams/Pstreams/gatherScatter.C
	src/OpenFOAM/db/IOstreams/Pstreams/gatherScatterList.C
	src/OpenFOAM/db/regIOobject/regIOobjectRead.C
	src/Pstream/dummy/UPstream.C
	src/Pstream/mpi/UPstream.C
	src/lagrangian/basic/Cloud/Cloud.C
	src/meshTools/regionSplit/regionSplit.C