Added Sticker pack.

Stickers/Stickers.xcassets/Contents.json

@@ -0,0 +1,6 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

Stickers/Stickers.xcassets/Sticker Pack.stickerpack/App icon stickers1.sticker/Contents.json

@@ -0,0 +1,9 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "filename" : "App icon stickers1.png"
+  }
+}

Stickers/Stickers.xcassets/Sticker Pack.stickerpack/App icon stickers2.sticker/Contents.json

@@ -0,0 +1,9 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "filename" : "App icon stickers2.png"
+  }
+}

Stickers/Stickers.xcassets/Sticker Pack.stickerpack/App icon stickers3.sticker/Contents.json

@@ -0,0 +1,9 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "filename" : "App icon stickers3.png"
+  }
+}

Stickers/Stickers.xcassets/Sticker Pack.stickerpack/Contents.json

@@ -0,0 +1,20 @@
+{
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  },
+  "properties" : {
+    "grid-size" : "regular"
+  },
+  "stickers" : [
+    {
+      "filename" : "App icon stickers1.sticker"
+    },
+    {
+      "filename" : "App icon stickers2.sticker"
+    },
+    {
+      "filename" : "App icon stickers3.sticker"
+    }
+  ]
+}

Stickers/Stickers.xcassets/iMessage App Icon.stickersiconset/Contents.json

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+{
+  "images" : [
+    {
+      "filename" : "58x58.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "87x87.png",
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "120x90.png",
+      "idiom" : "iphone",
+      "scale" : "2x",
+      "size" : "60x45"
+    },
+    {
+      "filename" : "180x135.png",
+      "idiom" : "iphone",
+      "scale" : "3x",
+      "size" : "60x45"
+    },
+    {
+      "filename" : "58x58.png",
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "29x29"
+    },
+    {
+      "filename" : "134x100.png",
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "67x50"
+    },
+    {
+      "filename" : "148x110.png",
+      "idiom" : "ipad",
+      "scale" : "2x",
+      "size" : "74x55"
+    },
+    {
+      "filename" : "1024x1024.png",
+      "idiom" : "ios-marketing",
+      "scale" : "1x",
+      "size" : "1024x1024"
+    },
+    {
+      "filename" : "54x40.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "scale" : "2x",
+      "size" : "27x20"
+    },
+    {
+      "filename" : "81x60.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "scale" : "3x",
+      "size" : "27x20"
+    },
+    {
+      "filename" : "64x48.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "scale" : "2x",
+      "size" : "32x24"
+    },
+    {
+      "filename" : "96x72.png",
+      "idiom" : "universal",
+      "platform" : "ios",
+      "scale" : "3x",
+      "size" : "32x24"
+    },
+    {
+      "filename" : "1024x768.png",
+      "idiom" : "ios-marketing",
+      "platform" : "ios",
+      "scale" : "1x",
+      "size" : "1024x768"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}