fix typo errors

fix lint error

Extend docu for is_linear

fix lint error

add reference

fix reference error

fix doc error

doc of weighting factor

improve explanation

fix lint

... property.

The implementation, unfortunately, needs fixed addresses for vector handling
in exprtk. Therefore there are two implementations, for 2D and 3D
holding vectors variables of correct sizes 4 and 6 or 5 and 9 corresponding
to Kelvin vector or vectorized tensors.

Ran do-release.py script.

of the implicit local coordinate base

 of the staggered scheme: max_iterations

 of the staggered coupling.

names mostly

Implementation of a finite strain mechanics process based solely on the
MFront material models.

The IdealGasLaw relies on the molar_mass property, same as before.
This finally removes the material_property/fluid subtree.