Merged requested to merge cleanup/ingroups_and_modules into master
What this MR does / why does DuMux need it:
This MR makes sure the modules in doc/doxygen/modules.txt match the current dumux folder structure. Wrong and missing ingroups are corrected. Missing
\files are included, excess
\files are removed.
Related to #1178 (closed)
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\ No newline at end of filecomment in "Changes" of this MR.