[ttml2] Add CT708 mapping information.

skynavga has just created a new issue for https://github.com/w3c/ttml2:

== Add CT708 mapping information. ==
Either fill in CT708 mapping information in Appendix T or remove this appendix.

Editorial note from 2014-03-06.

Please view or discuss this issue at https://github.com/w3c/ttml2/issues/381 using your GitHub account

Received on Monday, 5 June 2017 01:25:20 UTC