Devices.css update - iPhone 6 and 6 Plus in CSS

Hey everyone,

We just pushed a major update to Devices.css, not only did @Oleg rewrite it, but also added the iPhone 6 and 6 Plus.

Devices.css contain the prototype frames we use on Marvel, after some great feedback we decided to open-source them.

http://marvelapp.github.io/devices.css/

Enjoy!