Add entry_points to outputs in FIELDS

[jakirkham]

This appears to be usable in recipes and covered in the tests. So add it to FIELDS.

[jakirkham]

Could someone please review? Maybe @chenghlee?

[jakirkham]

@jezdez do you know if someone would be able to review this? 🙂

[jakirkham]

Rebased. Could someone please review?

[kenodegard]

And while we're at it this needs documenting in https://github.com/conda/conda-build/blob/master/docs/source/resources/define-metadata.rst#outputs-section

[jakirkham]

It is documented outside of outputs here. While outputs allows many of the same keys as the top-level recipe does, it appears not all of them are defined in outputs. Guessing as that would be somewhat repetitive. Not sure when we decide what things to include in outputs as well as general recipe documentation.

[kenodegard]

I agree we don't want to be repetitive, I'm thinking we want a list of keywords under outputs linking to blurbs defined in build/elsewhere? Since this is a larger investigation that extends beyond just entry_points I'll open a new issue for that work.

[jakirkham]

Thanks Ken! 😄