title: Print a line/multiline in a new layer over a map using Folium
body: <p>I have tried Python folium library with impressive results, but there is one feature I am missing, or in any case I can't find: I want to print a multiline in a new layer over the map.</p>
  
  <p>If I check de documentation, I can only find how to add markers and poligon markers. But about printing in a new layer, I can only find examples <a href="http://bl.ocks.org/wrobstory/5609959" rel="noreferrer">like this one</a>.</p>
  
  <p>I need something much simplier than that. I guess I could insert a GeoJSON with the multiline info in a similar way, but I haven't been able to even find which format should that GeoJSON have.</p>
  
  <p>Any idea for getting my multiline?</p>
  
  <p>PD: If you don't know how to achieve this using Python/Folium, I will be happy to hear what should I add to the Javascript output to get the multiline using Leaflet (that's what Folium library is using).</p>