1. Add TxProposals to mocha test page

2. The jshint tool found some instances where var was declared twice within a function. Seemed to originate from copy/paste-style coding. Most were unambiguously intended for a single block within the function. In a few cases, two declarations were consumed by one later reference. In those cases, I removed the duplicate var or I refactored slightly.

test/index.html

@@ -20,6 +20,7 @@
     <script src="test.PrivateKey.js"></script>
     <script src="test.PublicKeyRing.js"></script>
     <script src="test.storage.LocalEncrypted.js"></script>
+    <script src="test.TxProposals.js"></script>
     <script src="test.Wallet.js"></script>
     <script src="test.WalletFactory.js"></script>
     <script src="test.performance.js"></script>