started implementing on-screen controls

- directional pad works
- a,b,x,y work

Limelight/Images.xcassets/AButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "a_button.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "a_button-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "a_button-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/BButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "b_button.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "b_button-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "b_button-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/DownButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "down.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "down-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "down-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/LeftButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "left.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "left-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "left-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/RightButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "right.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "right-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "right-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/UpButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "up-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "up.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "up-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/XButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "x_button-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "x_button.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "x_button-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}

Limelight/Images.xcassets/YButton.imageset/Contents.json

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+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "scale" : "1x",
+      "filename" : "y_button.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x",
+      "filename" : "y_button-1.png"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x",
+      "filename" : "y_button-2.png"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}