Added outer product for FieldVector

src/amdis/common/FieldMatVec.hpp

@@ -367,6 +367,9 @@ namespace Dune
   template <class T, class S, int N, int M, int K>
   auto outer(FieldMatrix<T,N,K> const& vec1, FieldMatrix<S,M,K> const& vec2);
 
+  template <class T, class S, int N, int M>
+  auto outer(FieldVector<T,N> const& vec1, FieldVector<S,M> const& vec2);
+
   // ----------------------------------------------------------------------------
 
   template <class T>