Docu/doxygen instructions
Copied Simon's doxygen clean-up instructions from !1351 (merged) to a new README.md
The respective link in the styleguide points to the master branch and does not work right now.
Copied Simon's doxygen clean-up instructions from !1351 (merged) to a new README.md
The respective link in the styleguide points to the master branch and does not work right now.