Add a config file for casia fasd

bob/pad/face/config/casiafasd.py

+#!/usr/bin/env python
+
+"""Config file for the CASIA FASD dataset.
+Please run ``bob config set bob.db.casia_fasd.directory /path/to/casia_fasd_files``
+in terminal to point to the original files of the dataset on your computer."""
+
+from bob.pad.face.database import CasiaFasdPadDatabase
+database = CasiaFasdPadDatabase()