more info:
* Openstreetmap Wiki:Mapillary
http://wiki.openstreetmap.org/wiki/Mapillary
* "How to Street-View a bike path for a penny"
http://www.bodenseepeter.de/2014/07/01/how-to-street-view-a-...
* SOTM EU2014:Yubin Kuang: Mapillary - the missing view of the planet