Added unicode reference.
Added unicode reference.

razzius/PyClassLessons,razzius/PyClassLessons,PyClass/PyClassLessons,noisebridge/PythonClass,noisebridge/PythonClass,PyClass/PyClassLessons,noisebridge/PythonClass,noisebridge/PythonClass,PyClass/PyClassLessons,razzius/PyClassLessons,razzius/PyClassLessons