Merge branch 'feature/collectionOfFixes' into 'master'

.gitlab-ci.yml

CHANGELOG.md

dune/gfe/cosseratenergystiffness.hh

dune/gfe/nonplanarcosseratshellenergy.hh

dune/gfe/riemannianpnsolver.cc

dune/gfe/riemannianpnsolver.hh

dune/gfe/riemanniantrsolver.cc

problems/cosserat-continuum-cantilever.parset

problems/cosserat-continuum-twisted-strip.parset

problems/cosserat-continuum-wong-pellegrino-wrinkling.parset

problems/cosserat-continuum-wriggers-l-shape.parset

problems/film-on-substrate.parset

problems/gradient-flow-curve-shortening.parset

problems/harmonicmaps-skyrmions-hexagon.parset

problems/simofox-cantilever.parset

problems/staticrod.parset

problems/zero-volume-load.py

src/CMakeLists.txt

src/cosserat-continuum.cc

src/film-on-substrate.cc