anchor.diff:      + validFrom: `2016-12-13T05:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
       + validUntil: `2016-12-13T06:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
       + validPeriod: `PT0S,PT1H,PT3H,PT6H,PT12H,PT24H` (string, required) - comma separated list of periods to be retrieved. PT1H refers to one hour forecast periods.
  -    + timeZone: `UTC` (string, optional) - a time-zone ID, such as `Europe/Paris`, `-01:00` etc.
   
   + Response 200 (application/json)
   
  
positive.code: 
  + Parameters
      + locatedAt: `463pklwwsB4-4jtN81qz8hR` (string, optional) - compressed list of station locations, using Microsoft Point Compression Algorithm, is efficient for up to 400 locations
      + fields: `dewPointTemperatureInCelsius,visibilityProbabilityLessThan200MeterInPercent,saturationDeficitInHectoPascal` (string, required) - comma separated list of parameters to be contained inside response
      + validFrom: `2016-12-13T11:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
      + validUntil: `2016-12-13T12:00:00Z` (string, optional) - ISO8601 timestamp notation, means incl. this timestamp; always provide a time offset, e.g. 'Z' for UTC; optional: a request may provide correct offset (so that server can convert to UTC).
      + validPeriod: `PT0S` (string, required) - comma separated list of periods to be retrieved. use iso8601 time duration notation. PT1H refers one hour forecast periods.
  
  + Response 200 (application/json)
  
  
negative.code:             Cache-Control: max-age=90
  
      + Body
  	
  {
    "forecasts" : [
      {
        "locatedAt" : [-16.78, 32.69],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T20:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 4,
        "maxWindSpeedInKnots" : 4.7
      },
      {
        "locatedAt" : [-16.78, 32.69],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T02:00:00+02:00",
        "validPeriod" : "PT24H",
        "precipitationProbabilityInPercent" : 8,
        "maxWindSpeedInKnots" : 8.8
      },
      {
        "locatedAt" : [-16.78, 32.69],
        "validUntil" : "2016-12-13T08:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-13T02:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 2,
        "maxWindSpeedInKnots" : 3.9
      },
      {
        "locatedAt" : [-16.89, 32.65],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T20:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 1,
        "maxWindSpeedInKnots" : 4.3
      },
      {
        "locatedAt" : [-16.89, 32.65],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T02:00:00+02:00",
        "validPeriod" : "PT24H",
        "precipitationProbabilityInPercent" : 5,
        "maxWindSpeedInKnots" : 5.1
      },
      {
        "locatedAt" : [-16.89, 32.65],
        "validUntil" : "2016-12-13T08:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-13T02:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 1,
        "maxWindSpeedInKnots" : 3.7
      },
      {
        "locatedAt" : [-16.35, 33.067],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T20:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 2,
        "maxWindSpeedInKnots" : 4.7
      },
      {
        "locatedAt" : [-16.35, 33.067],
        "validUntil" : "2016-12-13T02:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-12T02:00:00+02:00",
        "validPeriod" : "PT24H",
        "precipitationProbabilityInPercent" : 3,
        "maxWindSpeedInKnots" : 8.8
      },
      {
        "locatedAt" : [-16.35, 33.067],
        "validUntil" : "2016-12-13T08:00:00+02:00",
        "stationTimeZoneName" : "Atlantic/Madeira",
        "validFrom" : "2016-12-13T02:00:00+02:00",
        "validPeriod" : "PT6H",
        "precipitationProbabilityInPercent" : 1,
        "maxWindSpeedInKnots" : 4.3
      }
    ]
  }
  
  # Example 3:
  ### Forecasted weather for multiple stations [GET]
  