Archiving a repo

To avoid people using code or data that is no longer up to date, it is a good idea to archive outdate repositories. Here is what to do:

• Delete all files from the repo (yes, all).

• Create README.md with something like

  # 🚨 Repository Archived 🚨
  
  This repository has been archived in favor of the module `blabpy.seedlings.merge` in our Python package [`blabpy`](https://github.com/BergelsonLab/blabpy/).
  
  Please refer to that module for any relevant functionality or updates.

• Add, commit, push all the changes.

• On GitHub, go to Settings -> Artchive