Added rel="me" to all social links

• Added `rel="me"` to each of the social links.
	» More info on the Microformats wiki: http://microformats.org/wiki/rel-me
• Changed the `rel="publisher"` on the Google+ link to a `<link href="…" rel="publisher">` tag in the head.
	» It seems Google recommends this in the head, but strangely as an `<a…>` tag (https://support.google.com/plus/answer/1713826?hl=en).  Other sites show it working as a `<link…>` tag.
Fixed Google font <link> to use double quotes

• Fixed the Google font `<link>` tag to use double quotes, per standard HTML.
	» I swear those high-paid PHD Google engineers really need to sit down and read some web standards specs— or maybe they just need less “creative” allowance.