[Dune] method pointer on entity.

[Robert Kloefkorn]

Hello Dune,

as decided in Berlin we wanted to add a method pointer that returns an 
EntityPointer on all entities. To create an EntityPointer one would write

EntityPointer p = entity.pointer();


Alternatively, one could add an explicit constructor taking an entity to 
the EntityPointer class. With this one could write

EntityPointer p( entity );

I prefer the second way.
What do the developers think?

Regards

R

-- 

   Robert Klöfkorn           <robertk at mathematik.uni-freiburg.de>

   Mathematisches Institut              Tel: +49 (0) 761 203 5631
   Abt. für Angewandte Mathematik       Fax: +49 (0) 761 203 5632
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