Merge branch 'feature/dynamicpolymorphism' into 'master'

cmake/modules/DuneIstlMacros.cmake

dune/istl/eigenvalue/poweriteration.hh

dune/istl/ldl.hh

dune/istl/novlpschwarz.hh

dune/istl/operators.hh

dune/istl/overlappingschwarz.hh

dune/istl/paamg/amg.hh

dune/istl/paamg/fastamg.hh

dune/istl/paamg/graphcreator.hh

dune/istl/paamg/hierarchy.hh

dune/istl/paamg/kamg.hh

dune/istl/paamg/pinfo.hh

dune/istl/paamg/twolevelmethod.hh

dune/istl/pardiso.hh

dune/istl/preconditioner.hh

dune/istl/preconditioners.hh

dune/istl/scalarproducts.hh

dune/istl/schwarz.hh

dune/istl/solver.hh

dune/istl/solvercategory.hh