Feature Request: Linkify/Embed IPFS URIs

[dtrammell]

It would be nice if Iris embedded IPFS files/media referenced by URI, or at the very least, linkified them.

Here's the Bitcoin Whitepaper: ipfs://QmRA3NWM82ZGynMbYzAgYTSXCVM14Wx1RZ8fKP42G6gjgj

Here's a PNG: ipfs://QmYqG69mizhfUPcZp9z3cB8acZ3whicotuW7x6y2mfFCcQ