Allow indicators to have no scale defined.
Allow indicators to have no scale defined.

Gapminder/vizabi,vizabi/vizabi,vizabi/vizabi,Gapminder/vizabi,sergey-filipenko/vizabi,Gapminder/vizabi,dab2000/vizabi,buchslava/vizabi,sergey-filipenko/vizabi,buchslava/vizabi,buchslava/vizabi,sergey-filipenko/vizabi,dab2000/vizabi,dab2000/vizabi