Remove Base64 object and respective file.

This object is only used for example purposes and not by the library itself, since modern browsers already implement window.btoa use this instead on the example page.

LICENSE.md

@@ -8,10 +8,4 @@ Copyright (c) 2010 António Afonso
 [BSD License](http://opensource.org/licenses/BSD-3-Clause)
 
 Copyright (c) 2010 Joshua Kifer
-[BSD License](http://opensource.org/licenses/BSD-3-Clause)
-
-src/base64.js
-=============
-http://www.webtoolkit.info/javascript-base64.html
-[Creative Commons](http://creativecommons.org/licenses/by/2.0/uk/)
-https://web.archive.org/web/20120906051836/http://www.webtoolkit.info/license
+[BSD License](http://opensource.org/licenses/BSD-3-Clause)

README.md

@@ -119,6 +119,18 @@ for AAC:
         genre: string
     }
 
+### How to show the cover art from the byte array:
+
+You can do this by using a `data:` url.
+
+```javascript
+var base64String = "";
+for (var i = 0; i < image.data.length; i++) {
+    base64String += String.fromCharCode(image.data[i]);
+}
+var dataUrl = "data:" + image.format + ";base64," + window.btoa(base64String);
+```
+
 ### Currently supported frames on ID3:
 
 * APIC/PIC: Attached picture