(HAProxy is now also using the private network.)
This fixes IPFS connections to Kosmos nodes from outside the network, as
well as in between nodes on the private network.
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.