General code cleanup.
Remove SuckerPunch/FistOfFury/Celluloid; replace with own Backgroundable implementation.
Spawn UserPoller in its own thread.
Increase database connection pool size. Threads ahoy!
Fixes button styling for iOS devices.

Apple does not allow to style `input[type="submit"]` and `button`, unless you tell 'em so.

_Note:_ I intentionally did not add this into the `_protoypes.scss` file, because it is `input[type="submit"], button` specific.
Merge pull request #4 from tvdeyen/patch-2

Fixes button styling for iOS devices.
Automatically discover post JSON

...instead of hardwiring /<slug>.json
Make #pants hear and talk Webmentions.
Fix links to posts attached to pings.
Add IndieAuth-ready web links
Fix User[...] work with scheme-less URLs
Simplify Pings listing
Display incoming ping sources to post author
Re-enable Turbolinks transition cache
Simplify Pings listing.
Support .lead paragraphs in post bodies.
Fix styling of "delete post" button.
CSS tweaks.
Rename "Friends" to "Following". Now optionally public.
Only display unfollow link when user can actually unfollow.