Improved TiddlyWiki showcase content

* image
* description

showcase/index.html

@@ -210,7 +210,7 @@
 
     <div class="row">
         <div class="col-md-12 col-lg-6">
-            <a href="http://felixhayashi.github.io/TW5-TiddlyMap/index.html">
+            <a href="http://tiddlymap.org">
                 <img src="./images/tiddlywiki.png" class="showcase img-responsive">
             </a>
             <div class="description">
@@ -218,9 +218,7 @@
                     <a href="http://tiddlywiki.com/"> TiddlyWiki</a>
                 </div>
                 <div class="descriptionContent">
-                    The vis graphs are neatly embedded in the overall wiki content and can support the text at any place. Also, since vis allows click events on nodes,
-                    articles can comfortably opened from any graph, which helps the user in quickly jumping between topics.
-                    Thus, a graph-wiki-hybrid is created which makes it incredibly easy to integrate, link and visualize ideas and topics.
+                    The open-source project TiddlyMap heavily draws on the Vis.js library to turn the personal note-taking software TiddlyWiki into a full-blown concept-mapping tool. Graphs may be embedded in the overall wiki content to accompany the text at any place and clickable nodes allow fast topic navigation. The resulting graph-wiki-hybrid makes it incredibly easy to integrate, link and visualize ideas.
                 </div>
             </div>
         </div>