WARNING: Downloading the AT&T database

bob.bio.base@2016-09-16 15:29:27,200 -- WARNING: Downloading the AT&T database from 'http://www.cl.cam.ac.uk/Research/DTG/attarchive/pub/data/att_faces.zip' to '/tmp/atnt_db_PLmxUp' ...
bob.bio.base@2016-09-16 15:29:27,200 -- WARNING: To avoid this, please download the database manually, extract the data and set the ATNT_DATABASE_DIRECTORY environment variable to this directory.