add ganesh meta tag

Author: Yvonne Yip

demo.html

@@ -9,7 +9,7 @@
 
   <meta charset="utf-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
-  <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
+  <meta name="viewport" content="width=device-width, minimum-scale=1.0, initial-scale=1, user-scalable=yes">
 
   <title>paper-button</title>