Add script for comparing video quality

This script makes it easier to run a simple command line
comparison between a captured YUV file and a reference video.

BUG=none
TEST=command line invocation
R=phoglund@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/1320007

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@4022 4adac7df-926f-26a2-2b94-8c16560cd09d
3 files changed