Add help and credits to About page

static/about.html

@@ -30,7 +30,7 @@
 		<header>
 			<h1>HTMLhouse</h1>
 			<nav>
-				<a class="home" href="/">HTML &#8962;</a>
+				<a class="home" href="/">&lt;&#8962;/&gt;</a>
 				<a class="current" href="/about.html">about</a>
 				<a href="mailto:hello@html.house">contact</a>
 			</nav>
@@ -40,7 +40,16 @@
 			<h2>About</h2>
 			<p>HTMLhouse helps you publish HTML quickly. Use the <a href="/">editor / preview</a> to build your HTML page, and press <strong>publish</strong> when you're done. That's it!</p>
 
-			<p>HTMLhouse was built by the team at <a href="https://write.as">Write.as</a>, another no-fuss platform that lets you share your thoughts anonymously.</p>
+			<p>HTMLhouse was built by the team at <a href="https://write.as">Write.as</a>.</p>
+
+			<h3>Help</h3>
+			<p><strong>Purpose</strong>. To provide a simple HTML testing ground with no cruft or fuss.</p>
+			<p><strong>Editing</strong>. Houses (individual pages) can be edited again from the same computer / browser it was created on. If you clear your browser data (specifically Local Storage) you will lose this ability.</p>
+			<p><strong>Limitations</strong>. Houses are not saved automatically &mdash; you must publish to save them permanently.</p>
+			<p><strong>Use</strong>. Only users with good intentions may use this software. If you <a href="mailto:hello@write.as">tell us</a> about broken things, we'll be forever greatful.</p>
+
+			<h3>Credits</h3>
+			<strong>Editor</strong>. <a href="http://ace.c9.io/">ACE editor</a>.
 		</div>
 
 <script type="text/javascript">

static/css/core.less

@@ -211,7 +211,7 @@ input {
 }
 
 #official-writing, #wrapper {
-	margin: 1em 2em;
+	margin: 1em 2em 4em;
 	font-size: 1.2em;
 	
 	h2, h3, h4 {