[ttml2] Pull Request: Add tts:textShadow example and modify semantics

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

== Add tts:textShadow example and modify semantics ==
This pull request makes some reversions back to CSS for 
`tts:textShadow` and adds an example image. Specifically the `inset` 
keyword and the 4th, "spread" value are prohibited in CSS so I removed
 them. This also dealt with an editorial note to define the semantics 
of `inset`. If there is a strong need to bring back and define those 
two extensions relative to CSS then I can revert those parts of the 
pull request.

See https://github.com/w3c/ttml2/pull/218

Received on Thursday, 3 November 2016 12:16:50 UTC