4.9.320.0

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35962 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e
Adding simple logging (#3772)

git-svn-id: http://dev.geogebra.org/svn/trunk/geogebra@35963 23ce0884-8a58-47d3-bc5c-ddf1cd5b9f9e