Implemented new database interface

bob/bio/base/database/__init__.py

bob/bio/base/database/csv_dataset.py

bob/bio/base/database/filelist/__init__.py

bob/bio/base/database/filelist/driver.py

bob/bio/base/database/filelist/models.py

bob/bio/base/database/filelist/query.py

bob/bio/base/test/data/atnt/idiap_protocol/dev_enroll.csv

bob/bio/base/test/data/atnt/idiap_protocol/dev_probe.csv

bob/bio/base/test/data/atnt/idiap_protocol/train.csv

bob/bio/base/test/data/atnt/models.lst

bob/bio/base/test/data/atnt/probes.lst

bob/bio/base/test/data/atnt/world.lst

...ata/example_csv_filelist/protocol_dev_eval/dev_enroll.csv

...data/example_csv_filelist/protocol_dev_eval/dev_probe.csv

...ta/example_csv_filelist/protocol_dev_eval/eval_enroll.csv

...ata/example_csv_filelist/protocol_dev_eval/eval_probe.csv

...est/data/example_csv_filelist/protocol_dev_eval/train.csv

...ata/example_csv_filelist/protocol_only_dev/dev_enroll.csv

...data/example_csv_filelist/protocol_only_dev/dev_probe.csv

...est/data/example_csv_filelist/protocol_only_dev/train.csv