[imsc] Pull Request: Add Stefan Poeschel to the acknowledgements

palemieux has just submitted a new pull request for https://github.com/w3c/imsc:

==  Add Stefan Poeschel to the acknowledgements ==
Closes #435 

See https://github.com/w3c/imsc/pull/449

Received on Monday, 3 September 2018 18:34:51 UTC