Created Use audio module as standalone library (markdown)

Use-audio-module-as-standalone-library.md

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+raylib audio module can be used as standalone library
+
+```c
+/*******************************************************************************************
+*
+*   raylib audio module as standalone library sample
+*
+*   NOTE: Sample dependencies:
+*       stb_vorbis - To load OGG data 
+*
+*   raylib audio module is distributed with raylib 1.3 (www.raylib.com)
+*   raylib is licensed under an unmodified zlib/libpng license (View raylib.h for details)
+*
+*   Copyright (c) 2015 Ramon Santamaria (@raysan5)
+*
+********************************************************************************************/
+
+#include <stdio.h>
+#include <conio.h>      // Windows only, no stardard library
+
+#include "audio.h"
+
+#define KEY_ESCAPE  27
+
+int main()
+{
+    // Initialization
+    //--------------------------------------------------------------------------------------
+    unsigned char key;
+    
+    InitAudioDevice();
+    
+    Sound fxWav = LoadSound("resources/weird.wav");        // Load WAV audio file
+    Sound fxOgg = LoadSound("resources/tanana.ogg");      // Load OGG audio file
+    
+    PlayMusicStream("resources/ambient.ogg");
+
+    printf("\nPress s or d to play sounds...\n");
+    //--------------------------------------------------------------------------------------
+    
+    while (key != KEY_ESCAPE)
+    {
+        // Update
+        //----------------------------------------------------------------------------------
+        if (kbhit()) key = getch();
+
+        if (key == 's') PlaySound(fxWav);
+        if (key == 'd') PlaySound(fxOgg);
+        
+        key = 0;
+        
+        UpdateMusicStream();
+        //--------------------------------------------------------------------------------------
+        
+        // Draw
+        //----------------------------------------------------------------------------------
+        // TODO: Something to draw?
+        //----------------------------------------------------------------------------------
+    }
+    
+    // De-Initialization
+    //--------------------------------------------------------------------------------------
+    UnloadSound(fxWav);     // Unload sound data
+    UnloadSound(fxOgg);     // Unload sound data
+    
+    CloseAudioDevice();
+    //--------------------------------------------------------------------------------------
+    
+    printf("\n\nPress ENTER to close...");
+    getchar();
+
+    return 0;
+}
+```