Add examples page with list of examples and iframe side by side (#21)

* initial version of repo button

* add repo link button to each example

* init examples page (mobile version still wip)

* fix mobile site styling (still wip)

* init examples.html (styling still wip)

* finish examples page; remove examples.json

* fix nits

* fix nits

examples/index.html

@@ -5,4 +5,4 @@
     </head>
     <body>
     </body>
-</html>
+</html>

examples/vfx-dynamic-lighting/index.html

@@ -221,4 +221,4 @@
   </script>
 </body>
 
-</html>
+</html>