Add tests for isZoomed.
Add tests for isZoomed.

kbaggott/dygraphs,grantadesign/dygraphs,danvk/dygraphs,petechap/dygraphs,davidmsibley/dygraphs,davidmsibley/dygraphs,Yong-Lee/dygraphs,jmptrader/dygraphs,mcanthony/dygraphs,danvk/dygraphs,reinert/dygraphs,Yong-Lee/dygraphs,vhotspur/dygraphs,pshevtsov/dygraphs,klausw/dygraphs,cavorite/dygraphs,socib/dygraphs,pshevtsov/dygraphs,vhotspur/dygraphs,witsa/dygraphs,davidmsibley/dygraphs,kbaggott/dygraphs,vhotspur/dygraphs,cavorite/dygraphs,timeu/dygraphs,kbaggott/dygraphs,mariolll/dygraphs,klausw/dygraphs,panuhorsmalahti/dygraphs,Akiyah/dygraphs,Akiyah/dygraphs,witsa/dygraphs,danvk/dygraphs,petechap/dygraphs,klausw/dygraphs,panuhorsmalahti/dygraphs,reinert/dygraphs,Yong-Lee/dygraphs,timeu/dygraphs,Yong-Lee/dygraphs,kbaggott/dygraphs,jmptrader/dygraphs,reinert/dygraphs,Akiyah/dygraphs,panuhorsmalahti/dygraphs,pshevtsov/dygraphs,mcanthony/dygraphs,mantyr/dygraphs,mariolll/dygraphs,klausw/dygraphs,witsa/dygraphs,jmptrader/dygraphs,mcanthony/dygraphs,petechap/dygraphs,Yong-Lee/dygraphs,mcanthony/dygraphs,mantyr/dygraphs,pshevtsov/dygraphs,grantadesign/dygraphs,timeu/dygraphs,vhotspur/dygraphs,mantyr/dygraphs,klausw/dygraphs,mariolll/dygraphs,mantyr/dygraphs,vhotspur/dygraphs,socib/dygraphs,jmptrader/dygraphs,jmptrader/dygraphs,socib/dygraphs,danvk/dygraphs,grantadesign/dygraphs,reinert/dygraphs,timeu/dygraphs,mcanthony/dygraphs,mariolll/dygraphs,mantyr/dygraphs,davidmsibley/dygraphs,cavorite/dygraphs,timeu/dygraphs,davidmsibley/dygraphs,grantadesign/dygraphs,panuhorsmalahti/dygraphs,petechap/dygraphs,Akiyah/dygraphs,cavorite/dygraphs,petechap/dygraphs,Akiyah/dygraphs,danvk/dygraphs,witsa/dygraphs,reinert/dygraphs,grantadesign/dygraphs,pshevtsov/dygraphs,socib/dygraphs,kbaggott/dygraphs,panuhorsmalahti/dygraphs,mariolll/dygraphs,witsa/dygraphs