This removes the cluster configuration and adds deployment of Kredits
IPFS Pinner. It also switches hubot-kredits to use the normal API
endpoint again (instead of the cluster port).
Furthermore, it upgrades go-ipfs to the latest version.
This adds a gateway endpoint for `http://ipfs.kosmos.org` on port 443
with support for `/ipfs/$objectHash` in order to GET documents from the
local gateway API.