update plugin-dev heading

plugin-dev.html

@@ -9,9 +9,7 @@ nav: 3
     <div class="inner">
         <h1 class="aligncenter">Create your own plugins &amp; themes</h1>
         <p class="description aligncenter">
-            Pico is highly customizable in two different ways:<br />
-            On the one hand you can change Picos apperance by using themes,<br />
-            on the other hand you can add new functionality by using plugins.
+            Pico is highly customizable -- the possibilites are endless when you're in control. 
         </p><br />
 
         <div class="one-fourth">