Get access to CERN's REANA instance and run first example

[matthewfeickert]

• [x] Go to https://reana.cern.ch/ and login with your CERN Single Sign On credentials
• [x] From your profile (https://reana.cern.ch/profile) record your REANA_ACCESS_TOKEN in a secure manner (recommendation: a password manager application)
  • You'll need your REANA_SERVER_URL as well, but that's public information (https://reana.cern.ch) that doesn't need to be protected
• [x] Create a new Python virtual environment for testing REANA
• [x] Run through the "first example" in the REANA "Getting started" docs using that Python virtual environment

[matthewfeickert]

@AndriiPovsten Great that you already went through this. Do you have any general questions on REANA? If no then you can close this Issue and we can move on with a Snakemake workflow.