Added special case for browser w/o mobile scroll support.
Added special case for browser w/o mobile scroll support.

jessiejea/Flotr2,beastlike/Flotr2,beastlike/Flotr2,RobertoMalatesta/Flotr2,alanponce/Flotr2,HumbleSoftware/Flotr2,alanponce/Flotr2,RobertoMalatesta/Flotr2,alanponce/Flotr2,beastlike/Flotr2,nicgallardo/Flotr2,nicgallardo/Flotr2,HumbleSoftware/Flotr2,jessiejea/Flotr2,jessiejea/Flotr2