Files generated by the Axona system

These test files were kindly provided by:
- `axona_raw.bin` and `axona_raw.set`
  * Steffen Bürgers & Abid Hussaini, PhD, Assistant Professor of Pathology and Cell Biology, The Taub Institute, Columbia University Irving Medical Center
- `dataset_unit_spikes` and `dataset_multi_modal`
  * Abid Hussaini, PhD, Assistant Professor of Pathology and Cell Biology, The Taub Institute, Columbia University Irving Medical Center