ENH: improve handling of finiteArea mesh with distributed roots

- in makeFaMesh, the serial fields are now only read on the master
  process and broadcast to the other ranks. The read+distribute is
  almost identical to that used in redistributePar, except that in
  this case entire fields are sent and not a zero-sized subset.

- improved internal faMesh checking for files so that the TryNew
  method works with distributed roots.

applications/utilities/finiteArea/checkFaMesh/checkFaMesh.C

@@ -95,7 +95,8 @@ int main(int argc, char *argv[])
 
     Info<< "Time = " << runTime.timeName() << nl << endl;
 
-    #include "printMeshSummary.H"
+    // Mesh information (verbose)
+    faMeshTools::printMeshChecks(aMesh);
 
     if (args.found("write-vtk"))
     {