Adding documentation for moon.VideoInfoHeader, general documentation clean-up of other video-related controls.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Convert double-quotes to single-quotes.
Merge pull request #1452 from enyojs/ENYO-11-aarontam

ENYO-11: Adding documentation for moon.VideoInfoHeader, general documentation cle...