[imsc] Add Stefan Poeschel to the acknowledgements

nigelmegitt has just created a new issue for https://github.com/w3c/imsc:

== Add Stefan Poeschel to the acknowledgements ==


Please view or discuss this issue at https://github.com/w3c/imsc/issues/435 using your GitHub account

Received on Friday, 13 July 2018 15:43:04 UTC