This will serve for now for smoke testing the output of `snapcount` against Snaptron directly. It takes ~1m to run (on Stingray at least): `cd external_tests && /bin/bash -x check.sh` Then check the `*.diff` files for any that are not 0-sized. The R script requires the [SummarizedExperiment](https://bioconductor.org/packages/release/bioc/html/SummarizedExperiment.html) package to be installed (via BioConductor) for its `rowRanges` function.