#3137 (Feb 26, 2021, 4:20:34 PM)

PR #1539: Variable References Plots

	Changes add references plot (commit: ab2532f) (details / githubweb) document, update (commit: 6ce1b83) (details / githubweb)
	GitHub pull request #1539 of commit 8aa25d5df092f8b98e66cfab8403caf2ccb91c67, no merge conflicts.
	SCM: git https://github.com/convexengineering/gpkit Commits since last build: 200 Latest commit: ad33978
	Test Result (no failures)