minor front page fix

Author: schteppe

index.html

@@ -113,7 +113,7 @@ <h2>What is cannon.js?</h2>
 
     <h3>Features</h3>
     <ul>
-      <li>Lightweight, smaller file size than physics engine ports, such as <a href="https://github.com/kripken/ammo.js">ammo.js</a> and <a href="http://www.jiglibjs.org/">JigLibJS</a>.</li>
+      <li>Lightweight, smaller file size than many ported physics engines.</li>
       <li>100% open source JavaScript, written from scratch.</li>
       <li>Uses an iterative Gauss-Seidel solver to solve constraints.</li>
       <li>Uses the <a href="https://www8.cs.umu.se/kurser/5DV058/VT09/lectures/spooknotes.pdf">SPOOK</a> stepper.</li>