Add version anchor

index.html

@@ -198,7 +198,7 @@ <h2>Contents</h2>
 		</ul>
 
 		<h2 id="new">What's new?</h2>
-		<h3>Version 0.7.0 / 15 October 2018</h3>
+		<h3 id="0.7.0">Version 0.7.0 / 15 October 2018</h3>
 		<p>There has been a major overhaul to remove the need for jQuery (replaced with <a href="http://slowe.github.io/stuquery/">stuQuery</a>). This has reduced the initial page load from 337kB to 200kB so it should hopefully load more quickly and save bandwidth. Also:</p>
 		<ul>
 			<li>Can set the width of gridlines (<code>gridlineswidth=5</code>) <a href="https://github.com/slowe/VirtualSky/issues/46">#46</a></li>