Add more chargers to the map and advanced filter function

Many charging stations are missing. PlugShare could serve a good starting point. Maybe users should also be able to add chargers manually. Also there should be an option to filter out the charging stations with less then 3-5 charging points. Can ruin your plans when you drive to a place that has 2 plugs and you find out that one is broken and 3 cars are waiting for the other one.