[drive] New design strategy

bob/ip/binseg/configs/datasets/drive.py

bob/ip/binseg/configs/datasets/drivetest.py

bob/ip/binseg/data/csvdataset.py

bob/ip/binseg/data/drive/__init__.py

bob/ip/binseg/data/drive/default.json

bob/ip/binseg/data/drive/second-annotation.json

bob/ip/binseg/data/drive/test.py

bob/ip/binseg/data/jsondataset.py

bob/ip/binseg/data/loader.py

bob/ip/binseg/data/sample.py

bob/ip/binseg/data/utils.py

conda/meta.yaml

doc/api.rst