Chat IPFS

[rmisio]

This change-set updates Chat to use IPFS to send messages. Some notes:

• only direct messages are supported at this time
• web to web chat works well
• web to desktop works well
• desktop to web does not work unless web sends the first message establishing a connection. I don't think ob-go is using the relay in a way that plays nice with ipfs-js. Hopefully, @placer14 and/or @hoffmabc can help me debug that when higher priority things are out of the way.

To initiate a chat convo with another peer, you must be logged in and you can call:

window.initiateChatConvo(peerID)

For web, your own peerID can be found in the console:

Swarm listening on /p2p-circuit/ipfs/QmREZaCgE9JwiEqBN4E3cNiFH1o2YctwiAbUcDGuyNh96o

closes #18

[rmisio]

@jjeffryes Peer review fixes are in and this PR should be ready for merge from my side.

Only thing I didn't do yet is that flex fix because I want to test it out and I'm on a newer IPFS and I don't want to downgrade to run this branch, so I'll look into it in my newer purchase PR.