Add function for import of albedo and snow depth from Meteonorm

[Martin - Solgrid AS]

I would very much have liked a function for importing albedo and snow data directly from Meteonorm, as this is something that is used frequently in our simulations. 

Instead of having to import this data from Meteonorm manually, the proposed function would provide ease of use to the UI in the same way that direct import of a horizon did.

We currently download snow depth data from local weather stations, when possible, for use in the Marion model, which enables the creation of a soiling profile due to snow. The same data is available from Meteonorm and together with data on temperature and irradiance allows for creating a snow profile when no local data is available. 

Would this be difficult to integrate in PVsyst?

[Michele Oliosi]

Thanks for the suggestion. It would indeed need some significant planning / work in terms of integration. But it would be quite interesting. Most likely this will land on our longterm roadmap.