ENH: centralize more libraries in src/phaseSystemModels

- prelude to code refactoring

NOTE
    no source code change in this commit, only relocation,
    renaming and adjustment of Make/{files,options}

src/phaseSystemModels/multiphaseInter/phasesSystem/multiphaseSystem/multiphaseSystems.C

@@ -0,0 +1,51 @@
+/*---------------------------------------------------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     |
+    \\  /    A nd           | www.openfoam.com
+     \\/     M anipulation  |
+-------------------------------------------------------------------------------
+    Copyright (C) 2017 OpenCFD Ltd.
+-------------------------------------------------------------------------------
+License
+    This file is part of OpenFOAM.
+
+    OpenFOAM is free software: you can redistribute it and/or modify it
+    under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    OpenFOAM is distributed in the hope that it will be useful, but WITHOUT
+    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+    for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with OpenFOAM.  If not, see <http://www.gnu.org/licenses/>.
+
+\*---------------------------------------------------------------------------*/
+
+#include "addToRunTimeSelectionTable.H"
+
+#include "phaseSystem.H"
+#include "multiphaseSystem.H"
+#include "MassTransferPhaseSystem.H"
+
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+namespace Foam
+{
+    typedef
+        MassTransferPhaseSystem<multiphaseSystem> massTransferMultiphaseSystem;
+
+    addNamedToRunTimeSelectionTable
+    (
+        multiphaseSystem,
+        massTransferMultiphaseSystem,
+        dictionary,
+        massTransferMultiphaseSystem
+    );
+
+}
+
+// ************************************************************************* //