Binder style implementation for those without CERN affilation

[vincecr0ft]

talk to Danilo and Diogo from SWAN team about setting up a ROOT build for https://mybinder.org

[vincecr0ft]

Or a SWAN instance (without persistence or EOS access) specific to these exercises.

[vincecr0ft]

Also I've tried enabling https://nbsphinx.readthedocs.io for static notebook implementation but then the docs failed the build. I should also check out nbviewer.