web-animations/web-animations-js — pull request #572 by ericwilligers (2014-03-26 22:03:22+00:00)
Title: Renames - AnimationGroup and AnimationSequence

Rename ParGroup to AnimationGroup
Rename SeqGroup to AnimationSequence

From Web Animations minutes, 27 Feb 2014
https://etherpad.mozilla.org/ep/pad/view/ro.WCBLOuse6D5/latest