big ugly commit that will be really hard to audit

This changeset applies new styles to the poll.

it also uses the new asynchronous wrappers around the localStorage api.
this is necessary because we're migrating to a storage system that will
use an async api.

The changes to the poll just happened to coincide with the async stuff.

My apologies to anyone who wants to read this whole thing

www/poll/index.html

@@ -35,17 +35,21 @@
 <div id="toolbar" class="buttons">
     <sub><a href="/"></a></sub>
 </div>
-<h1>CryptPoll </h1>
-<h2>Schedule or vote in <em>real time</em></h2>
+<h1>CryptPoll</h1>
+<h2>Zero Knowledge, <em>realtime</em> scheduling</h2>
 
-<p>Enter your name in the input field below and check the box for times when you are available</p>
+<p>Your settings are updated instantly, so you never need to save.</p>
+<p>All your input is encrypted so only people who have the link can access it. Even the server cannot see what you change.</p>
 
 <hr>
+<br>
 
 <form class="realtime">
     <input type="text" id="title" placeholder="title"><br />
     <textarea id="description" placeholder="description"></textarea>
 
+    <p>Enter your name in the input field below and check the box for times when you are available</p>
+
     <!-- Table markup-->
     <table id="table">