updated MaterialView README

Examples/MaterialView/MaterialView/Assets.xcassets/Flower.imageset/Contents.json

-{
-  "images" : [
-    {
-      "idiom" : "universal",
-      "filename" : "Flower.png",
-      "scale" : "1x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "2x"
-    },
-    {
-      "idiom" : "universal",
-      "scale" : "3x"
-    }
-  ],
-  "info" : {
-    "version" : 1,
-    "author" : "xcode"
-  }
-}
\ No newline at end of file

Examples/MaterialView/MaterialView/ViewController.swift

@@ -42,7 +42,7 @@ class ViewController: UIViewController {
 	*/
 	private func prepareGeneralMaterialViewExample() {
 		let materialView: MaterialView = MaterialView(frame: CGRectMake(107, 107, 200, 200))
-		materialView.image = UIImage(named: "Flower")
+		materialView.image = UIImage(named: "FocusAppIcon")
 		materialView.shape = .Square
 		materialView.shadowDepth = .Depth5
 		materialView.cornerRadius = .Radius3

README.md

@@ -32,7 +32,7 @@ MaterialView is the base UIView class used throughout MaterialKit. Like Material
 
 ```swift
 let materialView: MaterialView = MaterialView(frame: CGRectMake(107, 107, 200, 200))
-materialView.image = UIImage(named: "Flower")
+materialView.image = UIImage(named: "FocusAppIcon")
 materialView.shape = .Square
 materialView.shadowDepth = .Depth5
 materialView.cornerRadius = .Radius3