Dump nextbike (i.a. Warszawskie Veturilo) stations list into json array.
(search tags: veturilo api)
wget https://nextbike.net/maps/nextbike-official.xml?city=210 -O veturilo.xml
python nextbike2json.py veturilo.xml > veturilo.json
# or
wget -q https://nextbike.net/maps/nextbike-official.xml?city=210 -O - | python nextbike2json.py -