HTML5 video behaves properly when resumeOnVisible is set; see #525
use addBack or andSelf; fixes #508
platRtl is now only applied to the slideshow; see #526
video extension now uses YouTube iframe api script - should fix #191, #263, #333, #454, #501 and #525
stopAtEnd and showMultiple no longer shows empty panels - fixes #515
deprecated addWmodeToObject option & doc updates