Modifications:

- Qk-DG basis instead of Pk-DG
- No blocking
- Lexicographic DOF ordering
- Turning on nonlinear term (Navier Stokes instead of Stokes)
- Add methods for printing residual/jacobi matrix

Note: With the nonlinear term activated the solution of the program
is of course garbage since it does not use a nonlinear solver. Only
residual evaluation and assembly of the jacobi matrix are useful and
can be compared to generated code.

There is way more reasons to interpolate a function into the
solution vector and we cover them with one code path:
* Dirichlet boundary conditions (strong ones)
* Initial conditions for instationary expressions
* Initial guesses for Newton solvers

To be honest, I have no idea why this is failing now and not before.
But it makes sense, that the needed divisibility is not present here.

To comply with latest pdelab.

Make anisotropic quadrature order possible for non DG examples.

- Use TensorProductElement in one example.

- We still use the sumfact option to swicth to the sum factorization
  code branch. This way it is still possible to easily swicth between
  sumfact and non sumfact code.

- Only TensorProductElements with the same degree in all directions
  will work. Anisotropie and adaption of quadrature rule will happen
  in the next commits.

These are broken, see !98.

René Heß authored 7 years ago and Dominic Kempf committed 7 years ago

Conflicts:
	test/stokes/CMakeLists.txt

René Heß authored 7 years ago and Dominic Kempf committed 7 years ago

Note: Only works if recursion depth is high enough