Fix documentation

[felbecker]

The documentation (https://mslehre.github.io/MAS/) still needs some work here and there. I will assign you to this issue, if your code is related.

• Please keep doxygen comments in header files only.
• Please do not "overdocument". Class- and public member/method descriptions are important for others as well as comments for function arguments if they are not self-explanatory. Typically you don't include private member variables or local variables in your doxygen documentation.
• Test code for your features typically does not need doxygen comments.

[felbecker]

@Luc4sQ , your documentation here https://mslehre.github.io/MAS/classcolorlist.html looks confusingly e.g. in the method void colorlist::updateList. Edit: It seems like some doxygen comments in your .cc files are messing it up. You don't need to describe local variables with ///< in your source code. I think you can fix the documentation by replacing ///< with // in your .cc files.

[felbecker]

@sebastianbierb , can you add doxygen comments to the graph class in your next pull request please? This has high priority as the graph class is frequently used by others. Please make sure your public methods are well described and it is clear what to used them for and how.