Setup some papermill "jobs" on CircleCI

[rgbkrk]

Either as part of this repo or a new repo called something like "papermill-example-workflow", create a regularly running job on CircleCI that will run a notebook via papermill and post the result somewhere. It should be a nice way to demonstrate how to use papermill while also operating as a good functional test.

CircleCI will need to be enabled for the repo for this to work.

[thomasballinger]

example CircleCI task: #159
regularly scheduled jobs are also possible, but it seems hard to upload to the same url each time.

[betatim]

You could post the results to a gist using an API token so for each run you can update the gist instead of creating a new one to get a stable URL?