`min-device-width` becomes `min-width`

It's only the width that matters.
Merge branch 'master' of https://github.com/TedGoas/Cerberus
Updated Meta Tags for Responsive

Informed by
https://litmus.com/community/discussions/219-which-meta-tag-is-the-best-
for-responsive#comment-942
Merge branch 'master' into gh-pages