Don't setLevel on the library logger

[derek73]

util.py:7 calls log.setLevel(logging.ERROR) on the HumanName logger. Libraries should attach a NullHandler (already done) and leave the level at NOTSET so applications control verbosity — today, enabling DEBUG at the root logger still shows nothing from the parser until you discover this override and reset the level manually.

Fix: remove the setLevel call. __main__.py keeps its explicit CLI-side logging configuration.