[imsc] Pull Request: Update ttml-imsc1-errata.html

tmichel07 has just submitted a new pull request for 
https://github.com/w3c/imsc:

== Update ttml-imsc1-errata.html ==
added a nav section and few edits

See https://github.com/w3c/imsc/pull/182

Received on Thursday, 12 May 2016 21:02:49 UTC