Conflicts:
	dune/stuff/common/string_internal.hh

resolved to remote version

Where applicable we now default to YaspGrids that can handle non-trivial
origin coordinates.

GridUtils now default to YaspGrid, which is now also the only
grid implementation guaranteed to be availabe for testing
if dune-grid is present

Profiler timing change

This reverts commit d44a7fc7de788da73e6e0673a79c3116646bc6d3.

Forgot to move that one.

Linear function

Conflicts:
	dune/stuff/grid/provider/cube.hh
	dune/stuff/la/solver/istl.hh
	dune/stuff/la/solver/istl_amg.hh