[The notebook with the neuron_1k_v3 data](https://github.com/BUStools/BUS_notebooks_python/blob/master/dataset-notebooks/10x_neuron_1k_v3chem_python/10x_neuron_1k_v3chem.ipynb) shows downloading the 10X v2 whitelist. This should be changed to use the v3 barcodes (`3M-february-2018.txt.gz`).