Add stroke on bubble map
Add stroke on bubble map

jdk137/vizabi,Gapminder/vizabi,buchslava/vizabi,jdk137/vizabi,jdk137/vizabi,alliance-timur/vizabi,sergey-filipenko/vizabi,dab2000/vizabi,buchslava/vizabi,sergey-filipenko/vizabi,dab2000/vizabi,vizabi/vizabi,vizabi/vizabi,dab2000/vizabi,sergey-filipenko/vizabi,buchslava/vizabi,Gapminder/vizabi,Gapminder/vizabi,alliance-timur/vizabi,alliance-timur/vizabi