nicer error message that actually tells us what's going on, thanks to the changes in lib.blowfish upstream (on develop)

core/config.py

@@ -145,7 +145,7 @@ def parse_config(key):
         exit(1)
     except blowfish.BlowfishError as error:
         print "\nError decrypting passwords:"
-        print error
+        print "{0}: {1}.".format(error.__class__.__name__, error)
         exit(1)
 
 def _parse_config(key):