fix problem running get_translations if translations/ doesn't exist

setup.py

@@ -412,6 +412,7 @@ class get_translations(Command):
 
     def run(self):
         import urllib, shutil
+        if os.path.exists('translations'):
             shutil.rmtree('translations/')
         os.makedirs('translations')
         filename, headers = urllib.urlretrieve('http://wicd.sourceforge.net/translator/idlist/')