More links to outside resources

[mccalluc]

This is feedback from the IU survey. I don't consider it high priority, but I didn't want to sweep it under the rug, either:

Whenever appropriate, links should be made to Wikipedia, ontologies, protocols.io, papers and experts (ORCID IDs).

Some of this would be in other parts of the site, but much of it would be the docs.

(Unless you see yourself working on an issue in the near future, I suggest adding a note, and unassigning yourself.)