Need script to combine models

We will need a script to combine data from multiple models into a single output for further analysis and/or consumption by a web app. The input form at will take this format, which in this example shows the `tasmax` variable, for one year, for one model (`inmcm4`), for one RCP (`rcp85`.)

``` json
{"Philadelphia, United States of America": {
"admin": "United States of America",
"name": "Philadelphia",
"rcp85": {
"tasmax_inmcm4": {
"20160101": 123.0,
"20160102": 456.0,
...
}
}
}
}
```

Start by reviewing the repository and the JSON example in the issue, then determine how data from multiple models should be represented in one output for analysis or web-app consumption. The work is done when the required combined-output behavior is defined and the script meets that specification.

Written by the indexing model from the issue text.