[ttml2] Pull Request: Issue 0173 safe crop area editor

skynavga has just submitted a new pull request for 
https://github.com/w3c/ttml2:

== Issue 0173 safe crop area editor ==
Add ttp:safeCropArea (#173).

See https://github.com/w3c/ttml2/pull/197

Received on Tuesday, 11 October 2016 14:34:14 UTC