Remove hidden comments for cue and region settings

These aren't particularly illuminating, and the indentation would get
mangled by format.py. Fixing format.py does not seem worthwhile.
Merge pull request #83 from foolip/rm-setting-comments

Remove hidden comments for cue and region settings
Merge commit '14fd62d19f8a3e001acbf20edb4a18f1ef40a76d' into revert-regions

Conflicts:
	webvtt.html