Oliver Woodman 79d557dd80 Move WEBVTT custom header constants.
They're current location is annoying, because it creates a dependency
from the dash package to the webvtt package. For apps like Play Movies
where WEBVTT isn't used, it's nice just to delete the whole package at
import time, which requires that this dependency be removed.
2015-05-22 21:36:35 +01:00
..
2015-05-22 21:36:35 +01:00
2015-05-22 20:57:24 +01:00