[Dune] isLeaf method.

[Robert Kloefkorn]

Hi Christian,

I think you are right that this method should also exist on higher codim 
entities.

Regards

Robert

-- 

   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
   Universität Freiburg
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   http://www.mathematik.uni-freiburg.de/IAM/homepages/robertk