Update documentation for places dataset and method
Update documentation for places dataset and method

goingdotin/postcodes.io,cblanc/postcodes.io,ideal-postcodes/postcodes.io,ideal-postcodes/postcodes.io,goingdotin/postcodes.io,cblanc/postcodes.io,cblanc/postcodes.io,ideal-postcodes/postcodes.io,goingdotin/postcodes.io