md5 hash (or similar) for fastq.gz files

[Alexander-Stuckey]

I'm wondering if an option can be added to generate an md5 hash of the fastq.gz files after the bcl files have been demultiplexed by taca. I'd like to use this hash file to check that all files have finished transferring from st-preproc1 to st-analysis before a cron job tries to do anything to the files.