Added WattApp geojson

[ThomasRanvikEriksen]

Need to discuss this:

What to do about:

• WattApp Extensions
• "nc": "http://entsoe.eu/ns/nc#"
• The use of @language for string fields (name, description)
• Documentation of CapacitySchedule module

[ThomasRanvikEriksen]

@Sveino

Have you looked into this?

[ThomasRanvikEriksen]

WattApp spesific data and config data should be in own file