issue2550767: Add newitemcopy.py detector to notify users of new items. Added to detectors directory and a README.txt generated to describe the purpose of the directory. It also says the detectors are provided on an as-is basis and may not work. Detector by W. Trevor King (wking).

@rem python -m pip install sphinx
@rem python -m pip install sphinxcontrib-cheeseshop

python -m sphinx . html