Use std::array instead of Dune::array.

...semblers/geomexactstvenantkirchhofffunctionalassembler.hh

...assemblers/geomexactstvenantkirchhoffoperatorassembler.hh

...ufem/assemblers/localassemblers/strainproductassembler.hh

dune/fufem/assemblers/preconditioneddefectassembler.hh

dune/fufem/blockmatrixview.hh

dune/fufem/estimators/refinementindicator.hh

dune/fufem/functiontools/basisidmapper.hh

dune/fufem/interval.hh

dune/fufem/matlab_io.hh

dune/fufem/mechanics/newpfeassembler.hh

dune/fufem/test/common.hh

dune/fufem/test/functionintegratortest.cc

dune/fufem/test/laplaceassemblertest.cc

dune/fufem/test/secondorderassemblertest.cc

dune/fufem/ulis_tools.hh