###### BED
- chrom
- start
- end
- name (unused)
- score (unused)
- strand
- accessibilities : comma-separated list of integer indexes
###### Table
- tab-separated
- row indexes are chrom:start:end:strand corresponding to BED.
- columns are sample names.
- entries are 0/1 accessibility/binding/activity.
###### HDF5
- https://www.hdfgroup.org/HDF5/
- Basset will look for datasets named:
- train_in
- train_out
- valid_in
- valid_out
- test_in
- test_out
- test_headers
###### Model
- serialized Torch7 model
- basset_train.lua saves a check point after every epoch and saves the best validation loss.