Update instructions: nuke VDI and OOD; add ARE

[navidcy]

This PR updates the instructions and removes all references to deprecated VDI system.

Closes #272 Closes #328

[micaeljtoliveira]

What about ARE?

[navidcy]

ci/circleci: py36 — Your tests failed on CircleCI ?

[navidcy]

perhaps we wanna drop testing on python < 3.9?

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 54.94%. Comparing base (a9f5fc9) to head (3730930).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #311   +/-   ##
=======================================
  Coverage   54.94%   54.94%           
=======================================
  Files          22       22           
  Lines        1811     1811           
=======================================
  Hits          995      995           
  Misses        816      816           

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[navidcy]

I believe this is ready for review again ;)

[navidcy]

@aekiss does this PR resolve #328? Should we add more details for ARE?

[angus-g]

Thanks! Looks good from here. I'll let Andrew respond to your question above, but otherwise I'm happy.

[angus-g]

I've redirected the Cookbook documentation to that for the Recipes (#340), so I don't think this applies any more. This will probably fade out of relevance with the introduction of the Intake catalogue anyway.