Added check if update necessary

TODO

@@ -1,14 +1,14 @@
 TODO for dnsupdate
 
-- Check if address needs update before sending data and create a force 
-  update option
 - Have options to delete a server as well as add/update
+- Create a force update option
 - Integrate the relevant dnspython modules
 - Add a GUI
   wxPython and/or curses?
 
 
 Done:
+- Check if address needs update before sending data 
 - Validate data, check for cfg files existance
 - Re-structure the code
 - Add a config-file for hostname, domain and password. Option to select