Test visual regression

[ryuran]

Find a tool to test visual regression
and difference between browsers

[ryuran]

some tools to test

• https://github.com/galenframework/galen
• https://github.com/BBC-News/wraith
• https://github.com/facebookarchive/huxley
• https://github.com/Huddle/PhantomCSS

@nhoizey if you have time to test :p

[ryuran]

I try BackstopJS in an other project, it seems a good candidat.
https://garris.github.io/BackstopJS/