Add -webkit-full-page-media to pseudo-elements list
Add -webkit-full-page-media to pseudo-elements list

References:
* http://browserbu.gs/css-hacks/webkit-full-page-media/
* http://browserstrangeness.bitbucket.org/css_hacks.html#safari
* https://gist.github.com/afabbro/3759334

teoljungberg/scss-lint,cih/scss-lint