Client Update + BMD Export

[caseyhans]

• Add an animal bmds export
• Add .json to visual & datapivot endpoints

[munnsmunns]

Looks great! I recommend renaming the dfs if possible to be a little descriptive to make it easier to maintain the code, otherwise everything is good to go.

[shapiromatron]

I noticed an error in the output when demoing for a user, it looks like if there are multiple dose units, the N, resp, incidence columns are repeated. In this case there are 4 dose groups, 3 dose units, and there are 12 ns, when there should be 4 (I added indentation to show the repetition):

{
    "endpoint_id": 100008477,
    "n": [
        5, 5, 5, 5, 
        5, 5, 5, 5, 
        5, 5, 5, 5
    ],
    "response": [
        4.125, 4.241, 4.362, 5.107, 
        4.125, 4.241, 4.362, 5.107, 
        4.125, 4.241, 4.362, 5.107
    ],
    "stdev": [
        0.239, 0.259, 0.295, 0.126, 
        0.239, 0.259, 0.295, 0.126, 
        0.239, 0.259, 0.295, 0.126
    ],
    "dtype": "C",
    "doses": {
      "mg/m3": [0, 429.9, 1658.6, 3395.4],
      "ppm": [0, 100, 400, 800],
      "ppm (analytical)": [0, 99, 382, 782]
    },
    "incidence": null
  }

@caseyhans - I can work on this too if you're doing other things, I was the person who wrote the original implementation, and likely this bug, just let me know

[shapiromatron]

@caseyhans ok, I think I fixed the duplicates in 3af550d. Made a few more edits, let me know when you're happy and you can assign to @munnsmunns and myself for review

[shapiromatron]

nice job!