Add source tags in a few places where I forgot in earlier changesets

Adjust some start/end dates within the :edtf ranges to avoid rendering multiple features at the same time

Add Wikidata reference and copy improved start/end date, runway directions and airport code

Add former Oslo airport at Fornebu

Add pre-1970 farmland to Skjetten, plus a few roads and farmyards

Landuse changes related to development of Bråtejordet

Add Hoved Line past Strømmen and the existing + historical lines connected to Strømmen verksted

Connect Bergen Line to Wikidata

Add a section of the Bergen Line near Finse, including the Finse tunnel and the section it replaced

Map current state of Lillestrøm railway station tracks

Connect Gardemobanen to Wikidata, and add more detail to the tags

Extend Gardemoen Line from Lillestrøm to Gardermoen

Fix :edtf values (a..b -> a/b)

Add road network south of Lillestrøm

Add more road details near Rælingstunnelen

Add start_date to a small section of Storgata

Extend Fetveien east, including a few historic road configurations

Oslo: add Bispelokket and nearby highways

Lillestrøm: tag expanding residential landuse and indicate rail station changes with tracks and platforms

Lillestrøm: add important buildings, bridges, tunnels and some landuse