Updated Scene System (markdown)

Scene-System.md

@@ -10,6 +10,28 @@ The scene system is the backbone of the game client, utilizing the [strategy pat
 ## Breakdown
 
 main.cpp simply creates an instance of SceneManager, calls it's Init(), Loop() and Quit() functions in order, and handles any fatal exceptions thrown from the rest of the program.  
-scene_list.hpp holds an enum class of macros, one for each scene in the game. All scenes in the game should include this file in the .cpp.  
+scene_list.hpp holds an enum class of macros, one for each scene in the game. All scenes in the game should include this file in the *.cpp. The macros QUIT, CONTINUE and FIRST are reserved.
 base_scene.hpp and base_scene.cpp hold the interface of the strategy pattern i.e. all scenes in the game MUST inherit from the BaseScene class. This class handles the game's screen (which is a static member) and the player's input (via SDL).  
-...
+scene_manager.hpp and scene_manager.cpp hold the SceneManager class, which initializes and deinitializes the game client, and handles the transition between scenes in the strategy pattern.
+
+## Instructions
+
+To add a new scene to the game, create a class that inherits from BaseScene, overriding any or all of it's members. Then, include the class's header into scene_manager.cpp where it's indicated. Finally, add a new macro for your scene to scene_list.hpp, and modify SceneManager::LoadScene(SceneIndex) to include that macro and your scene's constructor.  
+Here's an example, using a class called "NewScene":
+
+```c++11
+void SceneManager::LoadScene(SceneList sceneIndex) {
+	UnloadScene();
+
+	switch(sceneIndex) {
+		//add scene creation calls here
+		case SceneList::FIRST: //use this to indicate the first scene created
+		case SceneList::NEWSCENE: //the macro
+			activeScene = new NewScene(); //the creation of a scene
+		break;
+
+		default:
+			throw(std::logic_error("Failed to recognize the scene index"));
+	}
+}
+```