Merge branch 'feature/remove-entitypointer' into 'master'

Feature/remove entitypointer

* Remove EntityPointer from grid traits
* Remove deprecated entityPointer method following upstream changes

See merge request !13

dune/foamgrid/foamgrid.hh

@@ -50,7 +50,6 @@ struct FoamGridFamily
         Dune::FoamGrid<dimgrid, dimworld>,
         FoamGridGeometry,
         FoamGridEntity,
-        FoamGridEntityPointer,
         FoamGridLevelIterator,
         FoamGridLeafIntersection,
         FoamGridLevelIntersection,
@@ -294,17 +293,6 @@ class FoamGrid :
             return leafIndexSet_;
         }
 
-        /** \brief Create EntityPointer from EnitySeed */
-        template < class EntitySeed >
-        static typename Traits::template Codim<EntitySeed::codimension>::EntityPointer
-        entityPointer(const EntitySeed& seed)
-        {
-            typedef FoamGridEntityPointer<EntitySeed::codimension, const FoamGrid> EntityPointerImpl;
-            typedef typename Traits::template Codim<EntitySeed::codimension>::EntityPointer EntityPointer;
-
-            return EntityPointer(EntityPointerImpl(FoamGrid::getRealImplementation(seed).getImplementationPointer()));
-        }
-
         /** \brief Create an Entity from an EntitySeed */
         template <class EntitySeed>
         static typename Traits::template Codim<EntitySeed::codimension>::Entity