Change proposals for the new DID charter

Not everyone may be subscribed to the DID charter repository, so just making a note here that there is a new PR at:

https://github.com/w3c/did-wg-charter/pull/6 <https://github.com/w3c/did-wg-charter/pull/6>

This already incorporates some smaller changes proposed by Brent.

Ivan

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Ivan Herman, W3C 
Home: http://www.w3.org/People/Ivan/
mobile: +33 6 52 46 00 43
ORCID ID: https://orcid.org/0000-0003-0782-2704