Move generic vector and matrix tools to dune-matrix-vector

This module still exhibits some tools that should be accessible via the dune-matrix-vector module. By b9f5301b some functionality has been moved and generalized, but a lot of things still remain. A todo list follows:

• genericvectortools.hh
  • avoid the GenericVector struct to allow for (ADL reliant) specialializations
• resize.hh (provides resizeInitialize*, consider integrating into dune-matrix' resize.hh)
• staticmatrixtools.hh