Add bounds check for circle so that touches are only registered if it falls within circle, not the view's frame rectangle.
Add bounds check for circle so that touches are only registered if it falls within circle, not the view's frame rectangle.

eliotfowler/EFCircularSlider,AlexanderMazaletskiy/EFCircularSlider,SatoTakeshiX/EFCircularSlider,glt3953/EFCircularSlider-glt3953,sidorov-panda/EFCircularSlider,rainkong/EFCircularSlider,neonaldo/EFCircularSlider,matthewyan/EFCircularSlider,DmitryNek/EFCircularSlider