ENH: regIOobject: use reverse order scatter for dictionary

Fixes #192

src/OpenFOAM/db/regIOobject/regIOobjectRead.C

@@ -3,7 +3,7 @@
   \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
    \\    /   O peration     |
     \\  /    A nd           | Copyright (C) 2011-2016 OpenFOAM Foundation
-     \\/     M anipulation  | Copyright (C) 2015 OpenCFD Ltd.
+     \\/     M anipulation  | Copyright (C) 2015-2016 OpenCFD Ltd.
 -------------------------------------------------------------------------------
 License
     This file is part of OpenFOAM.
@@ -115,7 +115,7 @@ bool Foam::regIOobject::read
         }
 
         // Send to my downstairs neighbours
-        forAll(myComm.below(), belowI)
+        forAllReverse(myComm.below(), belowI)
         {
             OPstream toBelow
             (