New feature type / city object for aggregations of weather data

Created by: JoachimBenner

Energy ADE version 0.8.0 defines a new type WeatherData, providing a time series of data for one meteorological or physical parameter. In order to sufficiently support energy related simulations, a new feature type / city object is needed, which (1) aggregates all weather data time series which shall be used by a specific simulation and (2) can be integrated into an Energy ADE model as city object. Attached a proposal for a corresponding feature type WeatherStation. Comments are welcome