added patches page for kastle v1.5, cleaned files

about.html

@@ -9,11 +9,9 @@
     <div class="topnav">
       <!-- <a class="active" href="#home">Home</a> -->
       <a href="./instruments.html">Instruments</a>
-      <a href="./sessions.html">Sessions</a>
       <a href="./index.html">Home</a>
     </div>
     <h1>About</h1>
-    <h2>Things you can do with this workbook:</h2>
   </body>
   
   <script type="text/javascript" src="js/main.js"></script>