Feature/measure nonlinear jacobian apply

Closes #111 and #119

See merge request dominic/dune-perftool!244

It can be patched from within perftool and dune-opcounter
shouldnt be mandatory for every vectorized computation.

So far, we had the opcounter cast to Dune::FieldVector
of size 1. Now it defines the correct type.

Merge/blockstructured vectorization second try

See merge request dominic/dune-perftool!242

updates VTKSequenceWriter explicitly

See merge request dominic/dune-perftool!221

Update submodules

See merge request dominic/dune-perftool!238

Feature/transformation based instrumentation

Closes #120

See merge request dominic/dune-perftool!237

Implement sumfact kernels in separate functions

Closes #75

See merge request dominic/dune-perftool!236

fixes the deprication warning for the blockstructured fem introduced in PDELab 2.6

See merge request dominic/dune-perftool!239

Simple test passes already

Avoid explicit doubles.