Various fixes to DG implementation and adaptation algorithms
What does this MR do?
- Bugfix in upwinding of DG operator, fixing #26 (closed)
- Add conductivity factor in flux term of Dirichlet boundary condition, resolving #36 (closed)
Rebuild of error estimator according to di Petro & Ern, resolving #25 (closed)
- Include term for Dirichlet boundary condition
Is there something that needs to be double checked?
- Timeout in some tests: Will be resolved by revamping the tests, see #46 (closed).
Can this MR be accepted?
- ODE tests are passing
- Reference tests have small deviation for fixed grids and larger ones for adaptive grids, which was to be expected