Time-series data collection for bolt

alluvium.write({ 
  "sfo-01": 200, 
  "yyz-02": 200, 
  "jfk-01": 200, 
  "svg-03": 200, 
  "fra-07": 200, 
  "ams-02": 200 
})

alluvium.read(function(results){
  console.log(results)

  {
    sfo-01:{
      "summary": { "200": 37 }
      "history": [200, 500, 404]
    }
  }
})