.travis.yml: remove special MIME::Types handling

https://rt.cpan.org/Ticket/Display.html?id=98664 is resolved, so
there's no need to keep the extra rule for perl 5.8 here.
osm2bbd: handle RW2 vs. RW1

http://wiki.openstreetmap.org/wiki/DE:Bicycle/Radverkehrsanlagen_kartieren#Stra.C3.9Fenbegleitender_benutzungspflichtiger_Radweg
documents the following
* RW2 is cycleway:$direction:bicycle=designated
* RW1 is cycleway:$direction:bicycle=yes
data update