[Dune] K1Vector

[Christian Engwer]

Hi,

> > Ich schlage deswegen vor,
> > die Klassen K1Vector und K11Matrix zu entfernen und stattdessen
> > FieldVector<...,1> bzw.  FieldMatrix<...,1,1> zu spezialisieren.

I finished the FieldMatrix / FielVector specialization for dim=1.
The problem is that we can't create an alias for K1Vector. So my
question is does anyone still need K1Vector and K11Matrix?

If so I would keep both for compatibility. If not I would just remove
them.

CU Christian