Add tasks for all the new languages

Task/Fractal-tree/Swift/fractal-tree.swift

@@ -0,0 +1,57 @@
+import UIKit
+
+extension CGFloat {
+  func degrees_to_radians() -> CGFloat {
+    return CGFloat(M_PI) * self / 180.0
+  }
+}
+
+extension Double {
+  func degrees_to_radians() -> Double {
+    return Double(M_PI) * self / 180.0
+  }
+
+}
+
+
+class Tree: UIView {
+
+
+  func drawTree(x1: CGFloat, y1: CGFloat, angle: CGFloat, depth:Int){
+    if depth == 0 {
+      return
+    }
+    let ang = angle.degrees_to_radians()
+    let x2:CGFloat = x1 + ( cos(ang) as CGFloat) * CGFloat(depth) * (self.frame.width / 60)
+    let y2:CGFloat = y1 + ( sin(ang) as CGFloat) * CGFloat(depth) * (self.frame.width / 60)
+
+    let line = drawLine(x1, y1: y1, x2: x2, y2: y2)
+
+    line.stroke()
+    drawTree(x2, y1: y2, angle: angle - 20, depth: depth - 1)
+    drawTree(x2, y1: y2, angle: angle + 20, depth: depth - 1)
+  }
+
+  func drawLine(x1:CGFloat, y1:CGFloat, x2:CGFloat, y2:CGFloat) -> UIBezierPath
+  {
+
+    let path = UIBezierPath()
+    path.moveToPoint(CGPoint(x: x1,y: y1))
+    path.addLineToPoint(CGPoint(x: x2,y: y2))
+    path.lineWidth = 1
+    return path
+  }
+
+  override func drawRect(rect: CGRect) {
+
+    let color = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0)
+    color.set()
+    drawTree(self.frame.width / 2 , y1: self.frame.height * 0.8, angle: -90 , depth: 9 )
+  }
+
+
+}
+
+
+let tree = Tree(frame: CGRectMake(0, 0, 300, 300))
+tree