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svn:author
V 8
sveinung
K 8
svn:date
V 27
2016-03-08T14:09:31.373447Z
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svn:log
V 561
sandbox: airlifting develops with technology.

Divide the unit types into light, medium and heavy weight units. Light
weight units can be airlifted once Flight is known. Medium weight units can
be airlifted once Advanced Flight is known. Heavy weight units can be
airlifted once Fusion Power is known. To airlift heavy and medium weight
units an airport is required both in the source and in the destination city.

Cities that know Flight can airlift one (light weight) unit per turn. An
Airport allows a city to airlift one more unit per turn.

See patch #7045
END