Add get/set methods to Buffer

lib/buffer.js

@@ -78,4 +78,12 @@ Buffer.prototype.write = function (string, offset, encoding) {
     default:
       throw new Error('Unknown encoding');
   }
-};
+};
+
+Buffer.prototype.get = function (index) {
+  return this[index];
+};
+
+Buffer.prototype.set = function (index, value) {
+  return this[index] = value;
+};