added an Update field to the Airfield and Waypoint structs, along with
proper usage in fusiontables and welt2000 plugins. also added usage of
the 'after' param in the cli.
Coverage decreased (-0.38%) when pulling c76139354006b1666e6a6a1813f78d69ca9cae13 on new/lastupdate#50 into d275f03dac920076c020127216364337e69a8eec on master.
Coverage remained the same when pulling dfbb6a18e560c35b595709c26e98fbe24bbad99a on new/lastupdate#50 into d275f03dac920076c020127216364337e69a8eec on master.
added an Update field to the Airfield and Waypoint structs, along with proper usage in fusiontables and welt2000 plugins. also added usage of the 'after' param in the cli.