GitLab service scheduled maintenance on Friday, March 21st 2025 as of 08h00 Geneva time for an estimated period of 1 hour. Further information under OTG0154918.
This was inspired by https://atlas-talk.web.cern.ch/t/running-recast-locally-not-working/677/4.
* Add Release 21 AnalysisBase + Python 2 virtual environment example.
* Add links to AnalysisBase releases in README.
* Add Makefile for local tests.
* Add CI