ref: 3f6f7289aaa5b91a16fab20702e536149c8c3f0c
parent: a0306ea660b2a35d09645e6d3e98d786614a874d
author: Jim Bankoski <jimbankoski@google.com>
date: Tue Mar 8 04:05:18 EST 2011
vp8cx- alternate ssim function with optimizations Change-Id: I91921b0a90dbaddc7010380b038955be347964b3