Merge branch 'fix/compatible-with-book' into 'master'

Fix/compatible with book

See merge request !113 (merged)

(cherry picked from commit ff9ed606)

83c67fc8 adapted values to be consistent ec3527ce adapted heatpipe to book, changed to pnsw 55d30314 added/changed a Newton criterion 08f50539 updated reference solutions of the examples affected by the previous changes a312d3fd tests pass now