ENH: isoSurfaceParams

- bundles selection and control parameters used when creating
  iso-surfaces. This simplifies selection and specification

- drop old compatibility handling of "cell" as a bool

- harmonize filter/regularisation flags for iso-surface

- for dictionary input, accept "isoMethod" and "isoAlgorithm" as being
  synonymous. Using "isoMethod" is less subject to typing errors.

applications/utilities/mesh/generation/foamyMesh/foamyHexMeshBackgroundMesh/Make/options

@@ -16,6 +16,7 @@ EXE_INC = \
     -I$(LIB_SRC)/meshTools/lnInclude \
     -I$(LIB_SRC)/finiteVolume/lnInclude \
     -I$(LIB_SRC)/dynamicMesh/lnInclude \
+    -I$(LIB_SRC)/sampling/lnInclude \
     -I../vectorTools
 
 EXE_LIBS = \
@@ -25,4 +26,5 @@ EXE_LIBS = \
     -ldecompose \
     -lmeshTools \
     -ldynamicMesh \
+    -lsampling \
     -lfiniteVolume

applications/utilities/mesh/generation/foamyMesh/foamyHexMeshBackgroundMesh/foamyHexMeshBackgroundMesh.C

@@ -311,7 +311,7 @@ tmp<scalarField> signedDistance
 )
 {
     tmp<scalarField> tfld(new scalarField(points.size(), Foam::sqr(GREAT)));
-    scalarField& fld = tfld();
+    scalarField& fld = tfld.ref();
 
     // Find nearest
     List<pointIndexHit> nearest;
@@ -713,8 +713,7 @@ int main(int argc, char *argv[])
             fvm,
             cellDistance,
             pointDistance,
-            0,      //distance,
-            false   //regularise
+            scalar(0) // distance
         );
 
         isoFaces.setSize(iso.size());