The map is working

[franpb14]

I have used the gem leaflet-rails and I had to implement from leaflet the css file (that's why there are so many lines added). I have also made a basic personalised marker. At the bottom of the map you can see a link to bdtonline The admin and update forms are changed with the new attributes, latitude is validated between [-90, 90] and longitude between [-180, 180].

https://user-images.githubusercontent.com/70280187/118023005-4ec81d00-b35d-11eb-8494-a42342f82a0b.mp4

closes #636.