Presumably internal debug message gets printed to stderr
Peewee supports logging using python's standard library logging module.  The logger can help you debug queries and also supports logging exceptions executing queries.  Python docs have you covered: 

http://docs.python.org/3.1/library/logging.html#configuring-logging-for-a-library

Few days ago I have upgraded from 2.1.4 to 2.1.5 and now everytime my CLI program runs, it dumps this line to stdout:

```
No handlers could be found for logger "peewee"
```

I have searched for this text in the sources for 2.1.5 but didn't find anything.

This looks related to logging module but my own program doesn't make use of logging module at all.
