[mapnik-german] Import administrative boundaries from osm-de.xml
[mapnik-german] Include mixed_list in aerialway
[mapnik-german] Sync @trunk-width-z(12|13) with @primary-width-z(12|13)

There is no real distinction in Germany between trunk and primary (they even share the same color). Use
the same width also for now, as it looks more consistent to me.