Replace TNO fork of JFreeChart with official release
The official release of JFreeChart v1.6.0 is awaiting the approval of the following merge requests:
- Enable scrollbars by refactoring
- Adding means to measure and illustrate differences in XYPlots (#224);
When JFreeChart 1.6.0 is available in the Maven repository, see https://search.maven.org/artifact/org.jfree/jfreechart/1.6.0/jar, replace the libraries in the
org.jfree.jfreechart plugin with the released versions.