Added documentation about Polylines
Added documentation about Polylines

ocefpaf/folium,zhoujh30/folium,BibMartin/folium,kod3r/folium,zhoujh30/folium,LACMTA/folium,koldunovn/folium,talespaiva/folium,andrewgiessel/folium,koldunovn/folium,QuLogic/folium,python-visualization/folium,ocefpaf/folium,koldunovn/folium,shankari/folium,LACMTA/folium,shankari/folium,kod3r/folium,QuLogic/folium,themiurgo/folium,python-visualization/folium,xujun10110/folium,themiurgo/folium,andrewgiessel/folium,zhoujh30/folium,talespaiva/folium,LACMTA/folium,xujun10110/folium,kod3r/folium,talespaiva/folium,QuLogic/folium,talespaiva/folium,droythorne/folium,droythorne/folium,themiurgo/folium,droythorne/folium,andrewgiessel/folium,BibMartin/folium,BibMartin/folium,xujun10110/folium,shankari/folium