* different content for official OSM, e.g. github urls
* set HTML title
* cache `update_data_date` result
* a new search causes a new pageview
* webpack or grunt build framework
* don't copy jquery/leaflet in /src, use dependency manager instead, e.g. https://bower.io/
* different content for official OSM, e.g. github urls
* set HTML title
* cache `update_data_date` result
* a new search causes a new pageview
* webpack or grunt build framework
* don't copy jquery/leaflet in /src, use dependency manager instead, e.g. https://bower.io/