Add Fargo database

New face recognition database.

We'll merge this as soon as http://gitlab.idiap.ch/bob/bob.db.fargo is public

bob/bio/face/config/database/fargo.py

+#!/usr/bin/env python
+
+from bob.bio.face.database import FargoBioDatabase
+
+fargo_directory = "[YOUR_FARGO_DIRECTORY]"
+
+database = FargoBioDatabase(
+    original_directory=fargo_directory,
+    original_extension=".png",
+    protocol='mc-rgb'
+)