ENH: Multiple updates to function objects

Updated objects
- corrected Peclet number for compressible cases
- propagated log flag and resultName across objects

New function objects
- new fluxSummary:
  - calculates positive, negative, absolute and net flux across face
    zones
- new runTimeControl
  - abort the calculation when a user-defined metric is achieved.
    Available options include:
    - average value remains unchanged wrt a given threshold
    - equation initial residual exceeds a threshold - useful to abort
      diverging cases
    - equation max iterations exceeds a threshold - useful to abort
      diverging cases
    - min/max of a function object value
    - min time step exceeds a threshold - useful to abort diverging
      cases
- new valueAverage:
  - average singular values from other function objects, e.g. Cd, Cl and
    Cm from the forceCoeffs function object

src/postProcessing/functionObjects/forces/forceCoeffs/forceCoeffs.C

@@ -343,20 +343,18 @@ void Foam::forceCoeffs::execute()
     scalar ClfTot = ClTot/2.0 + CmTot;
     scalar ClrTot = ClTot/2.0 - CmTot;
 
-    if (log_)
-    {
-        Info<< type() << " " << name_ << " output:" << nl
-            << "    Coefficients" << nl;
-    }
+    if (log_) Info
+        << type() << " " << name_ << " output:" << nl
+        << "    Coefficients" << nl;
+
     writeIntegratedData("Cm", momentCoeffs);
     writeIntegratedData("Cd", dragCoeffs);
     writeIntegratedData("Cl", liftCoeffs);
-    if (log_)
-    {
-        Info<< "        Cl(f)    : " << ClfTot << nl
-            << "        Cl(r)    : " << ClrTot << nl
-            << endl;
-    }
+
+    if (log_) Info
+        << "        Cl(f)    : " << ClfTot << nl
+        << "        Cl(r)    : " << ClrTot << nl
+        << endl;
 
     if (writeToFile())
     {