anchor.diff:  ### Forecasted weather for a given collection of *latitude* and *longitude* pairs, compressed by Point Compression Algorithm [GET]
   
   + 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 
  +    + 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.
  
positive.code: 
  + Parameters
      + meteoGroupStationIds: `8521,8522` (string, optional) - comma separated list of required meteostaions IDs.
      + fields: `windGustInMeterPerSecond,sunshineDurationInMinutes,precipitationAmountInMillimeter` (string, required) - comma separated list of parameters to be contained inside the 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: `PT1H` (string, required) - comma separated list of periods to be retrieved. use iso8601 time duration notation. PT1H refers one hour forecast periods.
  
negative.code: 			"saturationDeficitInHectoPascal" : 6.9,
  			"validFrom" : "2016-12-13T12:00:00Z",
  			"validPeriod" : "PT0S"
  		},
  		{
  			"dewPointTemperatureInCelsius" : 13,
  			"visibilityProbabilityLessThan200MeterInPercent" : 1,
  