[openrailwaymap] Finnish railway signals

Hello everybody, since two weeks the most important railways signals in Finland are rendered on the map. The signalling layer now shows main signals (Pääopastin) and distant signals (Esiopastin). Some Finnish railway mappers mapped more than 4500 main and distant signals, even before those signals were rendered on the map. They also created a detailled tagging scheme for Finnish signals in the OpenStreetMap wiki: http://wiki.openstreetmap.org/wiki/Fi:OpenRailwayMap/Tagging_in_Finland . Many thanks to the Finnish railway mappers for their support. We will cooperate with the Finnish community to extend the signalling layer by more signals in the future. It is also planned to create a JOSM tagging preset for Finnish signals to make mapping easier. Regards Alex