[fix][projector] Do not insert into empty matrix

See merge request !1627

Feature/linspace

Closes #715

See merge request !1624

[newton] Allow to change minimum number of Newton iterations

Closes #659

See merge request !1582

Feature/explicit diagonal solver

Closes #563

See merge request !1601

[newton] optional enable interactive newton output

Closes #718

See merge request !1621

Feature/monotone cubic spline

Closes #712

See merge request !1620

Revert "Merge branch 'fix/water-vapour-viscosity-calculation' into 'master'"

See merge request !1619

This reverts merge request !1615

Feature/projector

See merge request !1609

Dennis Gläser authored 5 years ago and Timo Koch committed 5 years ago

Functionality to create l2 projectors that project the solution
living in a function space basis on a domain grid into the function
space basis living on a target grid. Currently, the algorithm
assumes the grids to be non-conforming and expects a glue object.
An overload for different bases operating on the same grid can
be provided in the future, however, the current algorithm would
work as well (with the overhead of computing trivial intersections).

Fix/glue constructor

See merge request !1618

Feature/simplify effective laws

See merge request !1605

This will lead to a more unified interface for effective laws.
Any dependence on spatial parameters ca be introduced via
the volume variables and seems misplaced here. Also, effective
diffusion laws do not have such a blown-up interface anyway.

[staggered][gridgeometry] avoid warning of deprecated base class

See merge request !1617