Integrate with GraphQL

[boardfish]

GraphQL could potentially make a lot of RemoteRecord integrations extremely strong. When working on something internally, I ended up with a query like this:

query { 
  nodes(ids: ["sfgsagas", "MDExOlB1bGxSZXF1ZXN0NTcxMDU3NTky"]) {
    ...on PullRequest {
      title
    }
  }
}

{
  "data": {
    "nodes": [
      null,
      [
        [
          "title",
          "Add dot params transformer"
        ]
      ]
    ]
  },
  "errors": [
    {
      "type": "NOT_FOUND",
      "path": [
        "nodes",
        0
      ],
      "locations": [
        {
          "line": 7,
          "column": 3
        }
      ],
      "message": "Could not resolve to a node with the global id of 'sfgsagas'"
    }
  ]
}

This suggests a few things:

1. It could be possible to grab a variety of objects by ID, and pluck attributes
2. At least with GitHub's GraphQL API, we can handle failed lookups by compacting the nodes array.