add HDParams test to moch index, get rid of unused code that caused errors

test/index.html

@@ -25,11 +25,13 @@
     <script src="test.Wallet.js"></script>
     <script src="test.WalletFactory.js"></script>
     <script src="test.performance.js"></script>
+    <script src="test.HDParams.js"></script>
     <script src="test.HDPath.js"></script>
     <script src="test.Passphrase.js"></script>
     <script src="test.TxProposal.js"></script>
-    <script src="test.storage.File.js"></script>    
     <!--
+    Do not try to run test.storage.File.js in browser.
+    It is only applicable to the node environment.
     -->
     <script>
       mocha.run();