Merge pull request raulriera#119 from JulienKode/master

[Remove M_PI] For old versions of Swift, we use M_PI. To refer to the…

Author: raulriera

TextFieldEffects/TextFieldEffects/YokoTextField.swift

@@ -200,7 +200,7 @@ import UIKit
 
  var rotationAndPerspectiveTransform = CATransform3DIdentity
  rotationAndPerspectiveTransform.m34 = 1.0/800
- let radians = ((-90) / 180.0 * CGFloat(M_PI))
+ let radians = ((-90) / 180.0 * CGFloat.pi)
  rotationAndPerspectiveTransform = CATransform3DRotate(rotationAndPerspectiveTransform, radians, 1.0, 0.0, 0.0)
  return rotationAndPerspectiveTransform
  }