Support native iPhone 6 and 6+ resolutions in the example project.

Thanks to @_DavidSmith for the placeholder images: https://t.co/Cyh6Ve32Ab

Example/UICatalog/Images.xcassets/LaunchImage.launchimage/Contents.json

@@ -1,5 +1,32 @@
 {
   "images" : [
+    {
+      "extent" : "full-screen",
+      "idiom" : "iphone",
+      "subtype" : "736h",
+      "filename" : "iPhone6PlusPortrait.png",
+      "minimum-system-version" : "8.0",
+      "orientation" : "portrait",
+      "scale" : "3x"
+    },
+    {
+      "extent" : "full-screen",
+      "idiom" : "iphone",
+      "subtype" : "736h",
+      "filename" : "iPhone6PlusLandscape.png",
+      "minimum-system-version" : "8.0",
+      "orientation" : "landscape",
+      "scale" : "3x"
+    },
+    {
+      "extent" : "full-screen",
+      "idiom" : "iphone",
+      "subtype" : "667h",
+      "filename" : "iPhone6Portrait.png",
+      "minimum-system-version" : "8.0",
+      "orientation" : "portrait",
+      "scale" : "2x"
+    },
     {
       "orientation" : "portrait",
       "idiom" : "iphone",