[imsc] Add note indicating line padding can only use 'c' units.

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

== Add note indicating line padding can only use 'c' units. ==
To avoid confusion, it would be useful to add a note that 
ebutts:linePadding can only use 'c'.

Please view or discuss this issue at 
https://github.com/w3c/imsc/issues/110 using your GitHub account

Received on Sunday, 6 December 2015 01:27:05 UTC