Popup details on markers, small fix for map dragged

Popup details on markers (OSM-Tags if not emty): name, operator, collection_times, opening_hours, phone, website

post_box example:
![postbox-collection_time](https://f.cloud.github.com/assets/465714/1623791/7716f8da-56b8-11e3-93f3-b11aa098d3fa.png)