docstore support

[akshitababel]

We could not find a sample example on how to use this package.

We plan to persist this data structure through CRDT on the Redis(and then potentially migrate from Redis to IPFS) :

{
    "key": "value",
    "some_metadata": [
        {
            "sub_key": "sub_value",
            "sub_key": "sub_value"
        },
        {
            "sub_key": "sub_value",
            "sub_key": "sub_value"
        }
    ]
}

Can soundcloud/roshi help us achieve this?