Update README.md

Author: Hirbod

README.md

@@ -38,6 +38,9 @@ In order to install the new version, you have to:
 2) Delete Google Maps iOS SDK 
 > cordova plugin rm com.googlemaps.ios
 
+3) Delete plugin.http.request
+> cordova plugin rm plugin.http.request
+
 3) Re-Install plugin from master (follow wiki for Mac/Linux/Windows)
 > cordova plugin add https://github.com/wf9a5m75/phonegap-googlemaps-plugin --variable API_KEY_FOR_ANDROID="YOUR_KEY" --variable API_KEY_FOR_IOS="YOUR_KEY"