Popup Labels Displaying as Double with iOS8

[Boris-Em]

Please see issue #71.

With iOS8, popup labels are displayed as double when alwaysDisplayPopUpLabels is set to YES.

It seems like the issue comes from:

if ([self checkOverlapsForView:permanentPopUpView] == YES) {
permanentPopUpLabel.center = CGPointMake(self.xCenterLabel, circleDot.center.y + circleDot.frame.size.height/2 + 15);
}

Thank you to @MattiaConfalonieri for spotting this issue.