Exempt our meeting mechanics documents from the CC-BY-SA part and turn them into CC-BY or even CC-0

The meeting mechanism we use in the learning path (shaped by @rrrutledge and many others) has proven to work really well over time and people.
It turns out to be even valuable for other non learning path groups (e.g. our foundation board meetings).

However, the material is still CC-BY-SA licensed and thus would need to return changes back to its origin. Which some people might not be comfortable with for their corporate changes.
While I fully stand behind our choice of CC-BY-SA for the learning path material, I would like to ask to change the license for the above mentioned material to CC-BY (only attribution) or even CC-0 (as public domain as it gets, EU/DE just doesn't know the US public domain concept).

Git says that there is at least on-the-record contribution to it by @rrrutledge, @tsadler1988, @fioddor and of course @arnom-ms (and me, but I'm asking for the change, so count me as "for"). What do you think about this change?

How could we do it:

• Add a note to our README document and add the chosen license as a file to the meeting folder. We could also add Markdown comments indicating the license to those documents.

检查会议文件夹中的文档和 README，以确定拟议许可证变更所涵盖的材料。在决定项目接受什么之前，审查已记录的贡献者以及 issue 中 CC-BY 与 CC-0 的选项。选定的许可证已记录在 README 或许可证文件中，并在适当位置添加 Markdown 许可证注释，即表示完成。