multiValveEngineState: New functionObject to print and log the piston and valve motion

for the multiValveEngine fvMeshMover.  This replaced the hard-coded messages
printed by the multiValveEngine class, providing automatic logging of the piston
and valve speed and position and easy user extension or replacement to provide
additional case-specific diagnostics without having to hack the core
multiValveEngine code.  A functionObject configuration file is provided so that
the simple line

can be added to the system/functions file to enable this functionObject.

tutorials/XiFluid/kivaTest/system/functions

@@ -0,0 +1,19 @@
+/*--------------------------------*- C++ -*----------------------------------*\
+  =========                 |
+  \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
+   \\    /   O peration     | Website:  https://openfoam.org
+    \\  /    A nd           | Version:  dev
+     \\/     M anipulation  |
+\*---------------------------------------------------------------------------*/
+FoamFile
+{
+    format      ascii;
+    class       dictionary;
+    location    "system";
+    object      functions;
+}
+// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
+
+#includeFunc multiValveEngineState
+
+// ************************************************************************* //

tutorials/fluid/engine2Valve2D/system/functions

@@ -14,6 +14,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+#includeFunc multiValveEngineState
 #includeFunc checkMesh(executeControl=adjustableRunTime, executeInterval=5)
 
 // ************************************************************************* //