Result:

• 1) empty
• 2) community
• 3) community demo
• 4) dx core
• 5) dx core demo
• -6) dx core cloud dev -
• (Based on these comments, there is no longer need for a "cloud dev" webapp - it is the same as the dx core" webapp. https://wiki.magnolia-cms.com/display/DEV/DX+Core+module+reshuffling?focusedCommentId=194483199#comment-194483199)
  (Cloud dev is only needed if jumpstart command still allows getting pre-6.1 artifacts.)

Context

With Magnolia 6.1 - we will release the new DX core artifacts replacing enterprise standard, enterprise pro and cloud artifacts.

The mgnl CLI tools should reflect these changes.

Accepance criteria

Minimal

• The jumpstart command offers the new DX core webapp artifacts.
• "Help texts" are adapted accordingly (e.g. in npm-cli/lib/locales).
• Specifying no version: latest DX Core
• Specifying version in command: ability to chose previous versions before DX Core
• more???

Sophisticated

• CLI "knows" which artifacts can be downloaded for which Magnolia version and interacts gracefully with the user. 

The new artifact names

See DX Core module reshuffling