R dependencies are hard to figure out

[mpschr]

Hi

I run into the problem, that the qc_report fails because of missing R libraries. It would be great if you would write all the dependencies in the README. As is, a user must figure out, he can select the '--keep-temp-files' so that the R scripts are deleted to then inspect what libraries are required.

For other users: My R installation was missing readr, DT and networkD3

Best Michael