Process raw sequencing data (bcl format) to a count matrix, using the cellranger pipeline.
Input CSV is of the following format:
run_id, run_dir, samplesheet
Exp1234, /path/to/bcl/files/Exp1234, Exp1234_samplesheet.csv
Exp4321, /path/to/bcl/files/Exp4321, Exp4321_samplesheet.csv