playing around with leaflet a bit, works and also added the geo_json layer
with all the given hotspots, maybe try to iterate over geo_json and add
them that way for more versatility, also everything client side ->
needs to implement server + database (iterate over geo_json and save all
entries into db, then let the client grab those from the server)
maybe input your current address and calculate nearest hotspot

Signed-off-by: Fabian Jeschko <fabian.jeschko@students.uibk.ac.at>