Working on UWP support

Support Universal Windows Platform (UWP):
- Windows 10 App
- Windows Phone
- Xbox One

project/vs2015.UWP/raylib.App.UWP/App.h

@@ -0,0 +1,41 @@
+#pragma once
+
+#include <string>
+
+#include "pch.h"
+
+namespace raylibUWP
+{
+    ref class App sealed : public Windows::ApplicationModel::Core::IFrameworkView
+    {
+    public:
+        App();
+
+        // IFrameworkView Methods.
+        virtual void Initialize(Windows::ApplicationModel::Core::CoreApplicationView^ applicationView);
+        virtual void SetWindow(Windows::UI::Core::CoreWindow^ window);
+        virtual void Load(Platform::String^ entryPoint);
+        virtual void Run();
+        virtual void Uninitialize();
+
+    protected:
+
+		// Application lifecycle event handlers.
+		void OnActivated(Windows::ApplicationModel::Core::CoreApplicationView^ applicationView, Windows::ApplicationModel::Activation::IActivatedEventArgs^ args);
+		void OnResuming(Platform::Object^ sender, Platform::Object^ args);
+
+		// Window event handlers.
+		void OnWindowSizeChanged(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::WindowSizeChangedEventArgs^ args);
+		void OnVisibilityChanged(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::VisibilityChangedEventArgs^ args);
+		void OnWindowClosed(Windows::UI::Core::CoreWindow^ sender, Windows::UI::Core::CoreWindowEventArgs^ args);
+
+		// DisplayInformation event handlers.
+		void OnDpiChanged(Windows::Graphics::Display::DisplayInformation^ sender, Platform::Object^ args);
+		void OnOrientationChanged(Windows::Graphics::Display::DisplayInformation^ sender, Platform::Object^ args);
+
+	private:
+
+        bool mWindowClosed;
+        bool mWindowVisible;
+    };
+}