Changing examples to use makefile

- Testing a modified version of the makefile from raylib Instead of multiple project files for examples.
- Fixed readme example

Examples/models/models_cubicmap.cs

@@ -0,0 +1,7 @@
+using Raylib;
+using static Raylib.Raylib;
+
+public partial class Examples
+{
+    /*******************************************************************************************
    *
    *   raylib [models] example - Cubicmap loading and drawing
    *
    *   This example has been created using raylib 1.8 (www.raylib.com)
    *   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
    *
    *   Copyright (c) 2015 Ramon Santamaria (@raysan5)
    *
    ********************************************************************************************/
    
    
    public static void Main()
    {
        // Initialization
        //--------------------------------------------------------------------------------------
        int screenWidth = 800;
        int screenHeight = 450;
    
        InitWindow(screenWidth, screenHeight, "raylib [models] example - cubesmap loading and drawing");
    
        // Define the camera to look into our 3d world
        Camera camera = {{ 16.0f, 14.0f, 16.0f }, { 0.0f, 0.0f, 0.0f }, { 0.0f, 1.0f, 0.0f }, 45.0f, 0 };
    
        Image image = LoadImage("resources/cubicmap.png");      // Load cubicmap image (RAM)
        Texture2D cubicmap = LoadTextureFromImage(image);       // Convert image to texture to display (VRAM)
        
        Mesh mesh = GenMeshCubicmap(image, new Vector3( 1.0f, 1.0f, 1.0f ););
        Model model = LoadModelFromMesh(mesh);
        
        // NOTE: By default each cube is mapped to one part of texture atlas
        Texture2D texture = LoadTexture("resources/cubicmap_atlas.png");    // Load map texture
        model.material.maps[MAP_DIFFUSE].texture = texture;                 // Set map diffuse texture
        
        Vector3 mapPosition = { -16.0f, 0.0f, -8.0f };          // Set model position
    
        UnloadImage(image);     // Unload cubesmap image from RAM, already uploaded to VRAM
        
        SetCameraMode(camera, CAMERA_ORBITAL);  // Set an orbital camera mode
    
        SetTargetFPS(60);                       // Set our game to run at 60 frames-per-second
        //--------------------------------------------------------------------------------------
    
        // Main game loop
        while (!WindowShouldClose())            // Detect window close button or ESC key
        {
            // Update
            //----------------------------------------------------------------------------------
            UpdateCamera(&camera);              // Update camera
            //----------------------------------------------------------------------------------
    
            // Draw
            //----------------------------------------------------------------------------------
            BeginDrawing();
    
                ClearBackground(RAYWHITE);
    
                BeginMode3D(camera);
    
                    DrawModel(model, mapPosition, 1.0f, WHITE);
    
                EndMode3D();
                
                DrawTextureEx(cubicmap, new Vector2( screenWidth - cubicmap.width*4 - 20, 20 );, 0.0f, 4.0f, WHITE);
                DrawRectangleLines(screenWidth - cubicmap.width*4 - 20, 20, cubicmap.width*4, cubicmap.height*4, GREEN);
                
                DrawText("cubicmap image used to", 658, 90, 10, GRAY);
                DrawText("generate map 3d model", 658, 104, 10, GRAY);
    
                DrawFPS(10, 10);
    
            EndDrawing();
            //----------------------------------------------------------------------------------
        }
    
        // De-Initialization
        //--------------------------------------------------------------------------------------
        UnloadTexture(cubicmap);    // Unload cubicmap texture
        UnloadTexture(texture);     // Unload map texture
        UnloadModel(model);         // Unload map model
    
        CloseWindow();              // Close window and OpenGL context
        //--------------------------------------------------------------------------------------
    
        return 0;
    }
        
+}