Add bitcoinjs-bip38-2.0.2 library

Created using browserify:
git clone https://github.com/bitcoinjs/bip38.git
git checkout v2.0.2
npm install
npm run unit
browserify index.js --standalone bitcoinjs-bip38 > bitcoinjs-bip38-2.0.2.js

src/index.html

@@ -873,6 +873,7 @@
         <script src="js/kjua-0.1.1.min.js"></script>
         <script src="js/bitcoinjs-3.3.0.js"></script>
         <script src="js/bitcoinjs-extensions.js"></script>
+        <script src="js/bitcoinjs-bip38-2.0.2.js"></script>
         <script src="js/segwit-parameters.js"></script>
         <script src="js/ethereumjs-util.js"></script>
         <script src="js/ripple-util.js"></script>