chore(readme): added badges
chore(readme): added badges

at least some open source specific badges are present
sergey-filipenko/vizabi,dab2000/vizabi,buchslava/vizabi,buchslava/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,sergey-filipenko/vizabi,Gapminder/vizabi,vizabi/vizabi,vizabi/vizabi,buchslava/vizabi,Gapminder/vizabi,dab2000/vizabi,dab2000/vizabi