"Render" token level bounding boxes for a given paper sha

[DeNeutoy]

Given a PDF which has been ingested into the pdf structure service using Grobid, we will then want to fetch the lowest level of token stream annotation to display "invisibly" on top of the PDF. This will allow functionality such as as "snapping" to a span, and also make it easy to correlate new annotations to the raw token stream.

An example response from this low level service would be:

GET /raw/{sha}/{page}/

Response:

                "pages": [
                    {
                        "page": {
                            "index": 0,
                            "width": 612.0,
                            "height": 792.0
                        },
                        "tokens": [
                            {
                                "text": "Journal",
                                "x": 90.0,
                                "y": 41.97740173339844,
                                "width": 27.878599166870117,
                                "height": 7.970099925994873,
                                "styleName": "style167"
                            },
                            {
                                "text": "of",
                                "x": 120.69999694824219,
                                "y": 41.97740173339844,
                                "width": 6.8224101066589355,
                                "height": 7.970099925994873,
                                "styleName": "style167"
                            },
                  ]
         }
]

[codeviking]

A first pass at this is complete.