Explaination of 6 dimensions result

[WillemJiang]

As some reader doesn't have chance to read about the 9-factor model introduced in the articles by Klaas-Jan Stol and Brian.
We may add some explaitions about 6 dimensions.

[tapjdey]

I'll ask Brian and add some details.

[tapjdey]

Commit 6c9bcb2 addresses the issue.
@WillemJiang will need your help with the translation, and let me know if you need more details.

[WillemJiang]

@tapjdey Thanks for the information. I think the result could be more useful, if we can add some background information or suggestions for InnerSource mentor to provide more useful suggestions.