CDN files
Add
https://cdn.jsdelivr.net/fontawesome/4.5.0/css/font-awesome.min.css
https://cdn.jsdelivr.net/fontawesome/4.5.0/css/font-awesome.css
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/FontAwesome.otf
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/fontawesome-webfont.eot
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/fontawesome-webfont.svg
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/fontawesome-webfont.ttf
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/fontawesome-webfont.woff
https://cdn.jsdelivr.net/fontawesome/4.5.0/fonts/fontawesome-webfont.woff2