improve the wording

src/README.md

@@ -4,5 +4,12 @@ This directory contains the Harpy python package. This contains the command-line
 interface users interact with when they call `harpy qc ...`. It's where
 file inputs are checked, validated, and which workflows are executed by snakemake.
 
-This "part" of Harpy only has a dependency on `snakemake` and `rich-click` (and by
-extension, `rich` and `click`).
+This part of Harpy only has a dependency on `snakemake`, `rich-click` (and by
+extension, `rich` and `click`), samtools, and bcftools.
+
+## Contents
+- `globalscripts`: scripts that are not expected to be run inside a container and copied to the conda PATH
+- `reports`: RMarkdown files that are used to create the nice flexdashboard reports
+- `scripts`: scripts with dependencies that require a conda/container to have its dependencies available. these get copied into the `workdir/scripts` folder of a workflow
+- `snakefiles`: the snakefiles that govern the workflows for most harpy modules
+- everything else: the components of the harpy command line interface