Lesson1 online IDE made optional

Author: eddiejaoude

index.html

@@ -85,7 +85,7 @@ <h2>Python</h2>
           <h2>PHP</h2>
 
           <ul>
-            <li><a href="php/lesson1/tutorial.html">Lesson 1 - Online PHP Environment in Minutes</a></li>
+            <li><a href="php/lesson1/tutorial.html">[Optional] Lesson 1 - Online PHP Environment in Minutes</a></li>
             <li><a href="php/lesson2/tutorial.html">Lesson 2 - Introduction to PHP</a></li>
           </ul>
           </section>