Some capital cities are not imported in the new basemap

[vyskocil]

For example Windhoek the capital of Namibia is not imported when using basemap.ost because it's not a "million city".

I propose to add the following in basemap.ost (and other map.ost):

  TYPE place_capitalcity
    = NODE AREA ("place"=="city" AND EXISTS "capital" AND "capital"=="yes")
      {Name, NameAlt}  

This will also allow to render capital cities in a distinctive way.

But it seems we also need to update the import code dealing with place_xxxxcity as I could read the following warning in map.ost file:

// Do not delete the following types, they are required by the GenCityStreet import step

[Karry]

Good idea. Capitals of some countries have a small population. In contrast, China have a a huge number of "million cities".