Cherry-pick "Merge branch 'DoxygenUpdate-master-20190228' into 'master'" into 1.0
Doxygen/Emacs Update, master branch (2019.02.28.)
See merge request !451 (merged)
(cherry picked from commit 2c1bffd2)
- 4d13de60 Don't set up Pango and Cairo automatically anymore when using graphviz.