Center author & date on small device

Lots of small fixes

Signed-off-by: Joel Fischer <joel@livioradio.com>
Center author & date on post layout

Signed-off-by: Joel Fischer <joel@livioradio.com>
Add keyboard shortcuts for Homepage ('h'), and pagination (arrows) using Mousetrap.js

Unify pagination style on post and homepage layouts

Signed-off-by: Joel Fischer <joel@livioradio.com>