Clarify social networks usage...
Update Google+ link.

Also mention that we don't update that anymore due to no RSS feeds support.
Update jQuery to v1.11.1.
Update files for Jekyll 2.x.
Update Font Awesome to v4.1.0.
Update html5shiv to v3.7.2.
Revert "Update files for Jekyll 2.x."

This reverts commit 363421913f58ec4a475aa538294bf98f563a9b15.
Revert "Revert "Update files for Jekyll 2.x.""

This reverts commit eac8e8d6f106c13d3577ec5c25f2f0bb4427053d.
Rename from-matter variable.

This is a fix for Jekyll 2.x's issue we face with `name` being overwritten, probably because it's become a default variable or something. That, or it's a bug, but this should work regardless.
Enable html-minifier's `removeAttributeQuotes` option.
Enable html-minifier's `removeCSS` option.
Break long line.
Work around link getting added in accel.
Update dependencies.
WIP

Conflicts:
	source/_includes/footer.html