Improve Xcode 4 templates (close #285)

This is a complete rewrite.

tools/xcode/templates/SFML/SFML App.xctemplate/main.cpp

@@ -0,0 +1,91 @@
+
+//
+// Disclamer:
+// ----------
+//
+// This code will work only if you selected window, graphics and audio.
+//
+// Note that the "Run Script" build phase will copy the required frameworks
+// or dylibs to your application bundle so you can execute it on any OS X
+// computer.
+//
+// Your resource files (images, sounds, fonts, ...) are also copied to your
+// application bundle. To get the path to these resource, use the helper
+// method resourcePath() from ResourcePath.hpp
+//
+
+#include <SFML/Audio.hpp>
+#include <SFML/Graphics.hpp>
+
+// Here is a small helper for you ! Have a look.
+#include "ResourcePath.hpp"
+
+int main(int, char const**)
+{
+    // Create the main window
+    sf::RenderWindow window(sf::VideoMode(800, 600), "SFML window");
+
+    // Set the Icon
+    sf::Image icon;
+    if (!icon.loadFromFile(resourcePath() + "icon.png")) {
+        return EXIT_FAILURE;
+    }
+    window.setIcon(icon.getSize().x, icon.getSize().y, icon.getPixelsPtr());
+
+    // Load a sprite to display
+    sf::Texture texture;
+    if (!texture.loadFromFile(resourcePath() + "cute_image.jpg")) {
+        return EXIT_FAILURE;
+    }
+    sf::Sprite sprite(texture);
+
+    // Create a graphical text to display
+    sf::Font font;
+    if (!font.loadFromFile(resourcePath() + "sansation.ttf")) {
+        return EXIT_FAILURE;
+    }
+    sf::Text text("Hello SFML", font, 50);
+    text.setColor(sf::Color::Black);
+
+    // Load a music to play
+    sf::Music music;
+    if (!music.openFromFile(resourcePath() + "nice_music.ogg")) {
+        return EXIT_FAILURE;
+    }
+
+    // Play the music
+    music.play();
+
+    // Start the game loop
+    while (window.isOpen())
+    {
+        // Process events
+        sf::Event event;
+        while (window.pollEvent(event))
+        {
+            // Close window : exit
+            if (event.type == sf::Event::Closed) {
+                window.close();
+            }
+
+            // Espace pressed : exit
+            if (event.type == sf::Event::KeyPressed && event.key.code == sf::Keyboard::Escape) {
+                window.close();
+            }
+        }
+
+        // Clear screen
+        window.clear();
+
+        // Draw the sprite
+        window.draw(sprite);
+
+        // Draw the string
+        window.draw(text);
+
+        // Update the window
+        window.display();
+    }
+    
+    return EXIT_SUCCESS;
+}