visualise Berlin bicycle counters

[derhuerst]

Berlin has set up a few bicycle detectors across the city. They also have a map, but it's not very intuitive, iFrame-based and doesn't really work on mobile devices.

We can do better. Let's make visualise the data in a meaningful way, on a mobile-friendly website. We may also create multiple forms of presentation for different purposes, or compare it to other cities.

Note: I'm not sure if the data is open. We may want to visualise is anyways (to show what would be possible if it was open) or talk to the administration.