BHV-671: Update Cordova's backbutton event to use new History API
Enyo-DCO-1.1-Signed-off-by: Jason Robitaille <jason.robitaille@lge.com>
Merge pull request #45 from webOS-DevRel/BHV-671-jasonrobitaille

BHV-671: Update Cordova's backbutton event to use new History API

Reviewed-By: Ben Combee (ben.combee@lge.com)