Add the filelist interface

.gitignore

bob/bio/base/database/__init__.py

bob/bio/base/database/database.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

...est/data/example_fielist/data/model4_session1_sample2.pos

bob/bio/base/test/data/example_fielist/dev/for_models.lst

bob/bio/base/test/data/example_fielist/dev/for_probes.lst

bob/bio/base/test/data/example_fielist/dev/for_scores.lst

bob/bio/base/test/data/example_fielist/dev/for_tnorm.lst

bob/bio/base/test/data/example_fielist/dev/for_znorm.lst

bob/bio/base/test/data/example_fielist/eval/for_models.lst

bob/bio/base/test/data/example_fielist/eval/for_probes.lst

bob/bio/base/test/data/example_fielist/eval/for_scores.lst

bob/bio/base/test/data/example_fielist/eval/for_tnorm.lst

bob/bio/base/test/data/example_fielist/eval/for_znorm.lst

...test/data/example_fielist/norm/train_optional_world_1.lst

...test/data/example_fielist/norm/train_optional_world_2.lst