Update README.md

Author: zho

README.md

@@ -4,11 +4,16 @@ phonegap-imeiplugin
 Get The Real IMEI Number on Device
 
 Install:
+
     phonegap plugin add https://github.com/zho/phonegap-imeiplugin.git
 
-Usage:
+Example Usage:
+
     window.plugins.imeiplugin.getImei(callback);
 
     function callback(imei) {
         console.log("My Android IMEI :" + imei);
     }
+
+Android: Worked
+IOS: Not yet!