Copy edit for clarity and grammar

Made small edit to "How it Works Section", added "beginners can create ..." and "Experts can use their JSON skills ..."

website/templates/_description.html

@@ -3,9 +3,9 @@
   <h2>How it Works</h2>
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-      <p>TimelineJS is an open-source tool that enables you to build visually-rich interactive timelines from different sources. Creating one is as easy as filling in a Google spreadsheet or as detailed as JSON.</p>
+      <p>TimelineJS is an open-source tool that enables anyone to build visually,rich, interactive timelines. Beginners can create a timeline using nothing more than a Google spreadsheet. Experts can use their JSON skills to create custom installations, while keeping TimelineJS's core look and functionality.</p>
       <h4>Sources</h4>
-      <p>It can pull in media from different sources and has built in support for: <em>Twitter, Flickr, Google Maps, YouTube, Vimeo, Vine, Dailymotion, Wikipedia, SoundCloud and more media types are added regularly.</em></p>
+      <p>It can pull in media from a variety of sources and has built-in support for: <em>Twitter, Flickr, Google Maps, YouTube, Vimeo, Vine, Dailymotion, Wikipedia, SoundCloud and more media types are added regularly.</em></p>
 
       <h4>Tips &amp; tricks</h4>
       <ol>
@@ -45,4 +45,4 @@
     </div>
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-</section>
+</section>