polyTopoChange: Removed restrictive pointZone functionality

Now pointZones are handled directly by the applications and the new
pointZone::topoChange function so that any point can now be in any number of
zones, significantly increasing the flexibility and usefulness of pointZones.

The same rationalisation and generalisation will be applied to cellZones and
faceZones in the future.

src/polyTopoChange/createShellMesh/createShellMesh.C

@@ -522,7 +522,6 @@ void Foam::createShellMesh::setRefinement
         (
             patch_.localPoints()[pointi],   // point
             pointToPointMap.size(),         // masterPointID
-            -1,                             // zoneID
             true                            // inCell
         );
         pointToPointMap.append(pointi);
@@ -552,7 +551,6 @@ void Foam::createShellMesh::setRefinement
             (
                 pt,                     // point
                 pointToPointMap.size(), // masterPointID - used only addressing
-                -1,                     // zoneID
                 true                    // inCell
             );
             pointToPointMap.append(pointi);