Now that we correctly export the ol.animation.*, ol.easing.* and ol.coordinate.* symbols we can make the generate-exports.py script work for more cases.
This commit extends the generated Export constructors to support nested options objects. For example, this is now supported:
@exportObjectLiteralProperty ol.MapOptions.view ol.View|ol.View2DOptions|undefined
This specifies that the "view" property in the map options can reference an ol.View instance, an ol.View2DOptions literal object, or undefined. If the "view" property references an ol.View2DOptions literal object the ol.MapExport constructor will create an ol.View2DExport instance, and pass it to the parent constructor, ol.Map. In this way, extern types never cross the external/internal boundary. In other words, translations from non-renamed to renamed objects remain confined to the generated Export constructors.
We have constructors, like ol.View2D and ol.control.Attribution, whose "options" argument is optional (opt_options). But currently, we cannot do "new ol.View2D()" in uncompiled code that uses an ol3 build compiled in advanced mode. This commit fixes that by changing the generated Export constructors.
