ENYO-363: Add info properties to onratechange event.

Enyo-DCO-1.1-Signed-off-by: Aaron Tam <aaron.tam@lge.com>
Merge pull request #937 from enyojs/ENYO-363-aarontam-master

ENYO-363: Add info properties to onratechange event.

Integrated-By: Aaron Tam (aaron.tam@lge.com)