Ethereum tests

Expected values come from
https://www.myetherwallet.com/#view-wallet-info

Polyfill for ArrayBuffer.isView is required for phantomjs-2.1.1 but
seems not required in modern browsers. I'll keep it there because the
tests need to pass.

Also see https://github.com/kvhnuke/etherwallet/issues/337
Unusual capitalization of hex encoded ethereum address

src/index.html

@@ -651,6 +651,7 @@
                 <td class="privkey"><span data-show-qr></span></td>
             </tr>
         </script>
+        <script src="js/polyfill.es6.js"></script>
         <script src="js/jquery.min.js"></script>
         <script src="js/bootstrap.min.js"></script>
         <script src="js/levenshtein.js"></script>