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.

会議フォルダー内のドキュメントとREADMEを調べ、提案されているライセンス変更の対象となる資料を特定します。プロジェクトが何を受け入れるかを決める前に、記録されているコントリビューターと、issueのCC-BY対CC-0の選択肢を確認します。READMEまたはライセンスファイルに選択したライセンスが記載され、適切な箇所にMarkdownのライセンスコメントが追加されていれば完了です。