A helper function for jobs representing file uploads. Returns the URL of a newly-uploaded forecast from job_info.
job_info_forecast_url(zoltar_connection, the_job_info)
A ZoltarConnection
object as returned by new_connection()
a list
object as returned by job_info()
A URL of the new forecast
if (FALSE) {
new_forecast_url <- job_info_forecast_url(conn, "http://example.com/api/job/2/")
}