Add ability to get atc bookings

[marvk]

QuteScoop has the ability to display atc bookings as a list and even as a preview on the map.

This would certainly be a useful feature to have, but might require some reworking and some additional data types.

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This request comes courtesy of tw_simulations

[marvk]

The data URL is http://vatbook.euroutepro.com/servinfo.asp