New Tutorial: convert JS IPFS examples to tutorials

[alanshaw]

From @daviddias in https://github.com/ipfs/js-ipfs/issues/1816:

Perhaps they won't all be doable on ProtoSchool, but going through the list I would say that at least we can:

• https://github.com/ipfs/js-ipfs/tree/master/examples/browser-mfs
• https://github.com/ipfs/js-ipfs/tree/master/examples/browser-add-readable-stream
• https://github.com/ipfs/js-ipfs/tree/master/examples/browser-readablestream
• https://github.com/ipfs/js-ipfs/tree/master/examples/browser-video-streaming
• https://github.com/ipfs/js-ipfs/tree/master/examples/custom-libp2p
• https://github.com/ipfs/js-ipfs/tree/master/examples/explore-ethereum-blockchain
• https://github.com/ipfs/js-ipfs/tree/master/examples/ipfs-101
• https://github.com/ipfs/js-ipfs/tree/master/examples/traverse-ipld-graphs

[terichadbourne]

Additional notes from @daviddias in the previous issue:

These could actually be tutorials to get help from volunteers that are looking for ideas of tutorials to write

Also worth checking the ones in js-ipfs-api https://github.com/ipfs/js-ipfs-http-client/tree/master/examples

[terichadbourne]

It looks like https://github.com/ipfs/js-ipfs/tree/master/examples/ipfs-101 would translate nicely into one of our first tutorials on the file API. See issue #91 for more on that proposal.

[terichadbourne]

@johnnymatthews Are these all among the examples that you're planning to move into the docs site?

[johnnymatthews]

Yeah they are, but that whole "move everything into docs.ipfs.io" project got superseded by the "help Filecoin exist" project. So moving stuff over is on the back-burner for now.