List new contributors since release 6.4 and remove contribution instruction in the software guide (link to contributing.md)
Explain the rationale for the changes (possible link to a Request For Comments or to an issue).
Give an overview of the implementation: main changes made to classes, files and modules. Do not paste complete diff, as it is available in the merge request already.
Describe any changes made to existing applications, or new applications that have been added.
Describe the testing strategy for new features.
List or link documentation modifications that were made (doxygen, example, Software Guide, application documentation, CookBook).
List remaining open issues if any, and additional notes.
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