[opus] Channel Mapping Family for Ambisonics

[Michael Graczyk]

Thanks for the great input. I corrected a few other errors (spacing
and document name) and submitted the document. You can find the status
page here

https://datatracker.ietf.org/doc/draft-graczyk-codec-ambisonics/

and the document draft here

http://www.ietf.org/id/draft-graczyk-codec-ambisonics-00.txt

I will be sending an email out to the CODEC mailing list shortly.