sampledSurface::writers: Added writeFormat option to select ascii or binary

e.g. in tutorials/incompressible/pisoFoam/LES/motorBike/motorBike/system/cuttingPlane

    surfaceFormat   vtk;
    writeFormat     binary;
    fields          (p U);

selects writing the VTK surface files in binary format which significantly
speeds-up reading of the files in paraview.

Currently binary writing is supported in VTK and EnSight formats.

src/functionObjects/field/fieldValues/surfaceFieldValue/surfaceFieldValue.C

@@ -525,12 +525,7 @@ void Foam::functionObjects::fieldValues::surfaceFieldValue::initialise
 
         surfaceWriterPtr_.reset
         (
-            surfaceWriter::New
-            (
-                surfaceFormat,
-                dict.subOrEmptyDict("formatOptions").
-                    subOrEmptyDict(surfaceFormat)
-            ).ptr()
+            surfaceWriter::New(surfaceFormat, dict).ptr()
         );
     }
 }