Use newer form of catching exceptions

autopep8 -i --select=W602
Also some other minor deprecated syntax changes, like "while 1".
I did not commit the less obvious changes.

modules/aum/captcha.py

@@ -197,7 +197,7 @@ class Decoder(object):
 
     def main(self):
         try:
-            while 1:
+            while True:
                 self.process()
         except KeyboardInterrupt:
             print ''