Add raylib lua examples

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diff --git a/examples/shaders_standard_lighting.lua b/examples/shaders_standard_lighting.lua
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+-------------------------------------------------------------------------------------------
+--
+--  raylib [shaders] example - Standard lighting (materials and lights)
+--
+--  NOTE: This example requires raylib OpenGL 3.3 or ES2 versions for shaders support,
+--        OpenGL 1.1 does not support shaders, recompile raylib to OpenGL 3.3 version.
+--
+--  NOTE: Shaders used in this example are #version 330 (OpenGL 3.3), to test this example
+--        on OpenGL ES 2.0 platforms (Android, Raspberry Pi, HTML5), use #version 100 shaders
+--        raylib comes with shaders ready for both versions, check raylib/shaders install folder
+--
+--  This example has been created using raylib 1.6 (www.raylib.com)
+--  raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+--
+--  Copyright (c) 2014-2016 Ramon Santamaria (@raysan5)
+--
+-------------------------------------------------------------------------------------------
+
+-- Initialization
+-------------------------------------------------------------------------------------------
+local screenWidth = 800
+local screenHeight = 450
+
+SetConfigFlags(FLAG.MSAA_4X_HINT)      -- Enable Multi Sampling Anti Aliasing 4x (if available)
+
+InitWindow(screenWidth, screenHeight, "raylib [shaders] example - model shader")
+
+-- Define the camera to look into our 3d world
+local camera = Camera(Vector3(4.0, 4.0, 4.0), Vector3(0.0, 1.5, 0.0), Vector3(0.0, 1.0, 0.0), 45.0))
+local position = Vector3(0.0, 0.0, 0.0)   -- Set model position
+
+local dwarf = LoadModel("resources/model/dwarf.obj")                     -- Load OBJ model
+
+local material = LoadStandardMaterial()
+
+material.texDiffuse = LoadTexture("resources/model/dwarf_diffuse.png")   -- Load model diffuse texture
+material.texNormal = LoadTexture("resources/model/dwarf_normal.png")     -- Load model normal texture
+material.texSpecular = LoadTexture("resources/model/dwarf_specular.png") -- Load model specular texture
+material.colDiffuse = WHITE
+material.colAmbient = (Color){0, 0, 10, 255}
+material.colSpecular = WHITE
+material.glossiness = 50.0f
+
+dwarf.material = material      -- Apply material to model
+
+local spotLight = CreateLight(LIGHT_SPOT, (Vector3){3.0f, 5.0f, 2.0f}, (Color){255, 255, 255, 255})
+spotLight->target = (Vector3){0.0f, 0.0f, 0.0f}
+spotLight->intensity = 2.0f
+spotLight->diffuse = (Color){255, 100, 100, 255}
+spotLight->coneAngle = 60.0f
+
+local dirLight = CreateLight(LIGHT_DIRECTIONAL, (Vector3){0.0f, -3.0f, -3.0f}, (Color){255, 255, 255, 255})
+dirLight->target = (Vector3){1.0f, -2.0f, -2.0f}
+dirLight->intensity = 2.0f
+dirLight->diffuse = (Color){100, 255, 100, 255}
+
+local pointLight = CreateLight(LIGHT_POINT, (Vector3){0.0f, 4.0f, 5.0f}, (Color){255, 255, 255, 255})
+pointLight->intensity = 2.0f
+pointLight->diffuse = (Color){100, 100, 255, 255}
+pointLight->radius = 3.0f
+
+-- Setup orbital camera
+SetCameraMode(CAMERA.ORBITAL)          -- Set an orbital camera mode
+SetCameraPosition(camera.position)     -- Set internal camera position to match our camera position
+SetCameraTarget(camera.target)         -- Set internal camera target to match our camera target
+
+SetTargetFPS(60)                       -- Set our game to run at 60 frames-per-second
+-------------------------------------------------------------------------------------------
+
+-- Main game loop
+while not WindowShouldClose() do       -- Detect window close button or ESC key
+    -- Update
+    ---------------------------------------------------------------------------------------
+    UpdateCamera(&camera)              -- Update internal camera and our camera
+    ---------------------------------------------------------------------------------------
+
+    -- Draw
+    ---------------------------------------------------------------------------------------
+    BeginDrawing()
+
+        ClearBackground(RAYWHITE)
+
+        Begin3dMode(camera)
+            
+            DrawModel(dwarf, position, 2.0, WHITE)   -- Draw 3d model with texture
+            
+            DrawLight(spotLight)       -- Draw spot light
+            DrawLight(dirLight)        -- Draw directional light
+            DrawLight(pointLight)      -- Draw point light
+
+            DrawGrid(10, 1.0)          -- Draw a grid
+
+        End3dMode()
+        
+        DrawText("(c) Dwarf 3D model by David Moreno", screenWidth - 200, screenHeight - 20, 10, GRAY)
+        
+        DrawFPS(10, 10)
+
+    EndDrawing()
+    ---------------------------------------------------------------------------------------
+}
+
+-- De-Initialization
+-------------------------------------------------------------------------------------------
+UnloadMaterial(material)   -- Unload material and assigned textures
+UnloadModel(dwarf)         -- Unload model
+
+-- Destroy all created lights
+DestroyLight(pointLight)
+DestroyLight(dirLight)
+DestroyLight(spotLight)
+
+CloseWindow()              -- Close window and OpenGL context
+-------------------------------------------------------------------------------------------
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