Add option for scaling star sizes

index.html

@@ -276,6 +276,7 @@ <h2>Options</h2>
 			<li><code>showorbits</code> (false) - show/hide the orbits of the planets</li>
 			<li><code>showstars</code> (true) - show/hide the stars</li>
 			<li><code>showstarlabels</code> (false) - show/hide the star labels for the brightest stars</li>
+			<li><code>scalestars</code> (1) - the factor by which to scale the star sizes</li>
 			<li><code>showdate</code> (true) - show/hide the date and time</li>
 			<li><code>showposition</code> (true) - show/hide the latitude and longitude</li>
 			<li><code>gridlines_az</code> (false) - show/hide the azimuth/elevation grid lines</li>