Merge branch 'feature-memory-streams' into 'develop'

applications/test/IListStream/Test-IListStream.C

applications/test/OCountStream/Test-OCountStream.C

applications/test/UIListStream/Test-UIListStream.C

src/OpenFOAM/db/IOstreams/memory/IListStream.H

src/OpenFOAM/db/IOstreams/memory/OCountStream.H

src/OpenFOAM/db/IOstreams/memory/OListStream.H

src/OpenFOAM/db/IOstreams/memory/UIListStream.H

src/OpenFOAM/db/IOstreams/memory/UOListStream.H

src/OpenFOAM/db/IOstreams/memory/memoryStreamBuffer.H