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Use -e only in docs targeted at contributors.

If a user copy-pastes  command line with [--editable], they will hit
an error. If they don't know the --editable option, we're giving them
a choice to make before they can move forwards, but this isn't a choice
they need to make right now.

* license

* changes

* ok

* Update paper link and commands to run

* pointer to uber repo

Co-Authored-By: Rosanne Liu <mimosavvy@gmail.com>