To support mesh redistribution for load-balancing etc. all MeshObjects requiring
a special updateMesh(const mapPolyMesh&) function will also require a
distribute(const mapDistributePolyMesh&) to handle the redistribution of
no-field and unregistered mesh-related state data.
Fortunately there are not many MeshObjects requiring a special distribute(const
mapDistributePolyMesh&) implementation but it will take some time to implement
and test all those that do; this patch provides those for displacement-based
mesh-movers.
a0ac78c129