#470 (Dec 1, 2020, 9:08:08 PM)

PR #1531: Partial vector substitution

	Changes allow partial vectorvar substitutions (commit: f318ccd) (details / githubweb) lint (commit: c3074b5) (details / githubweb) add shape check (commit: 17394aa) (details / githubweb) whoops, snuck in some code from another branch (commit: 861bced) (details / githubweb)
	GitHub pull request #1531 of commit 861bcede7efef77c9e7f6ee006c4236d8ed3cd17, no merge conflicts.
	Test Result (2 failures / -2) gpkit.tests.from_paths.TestFiles.test_solar_sens_chart_py_mosek_cli gpkit.tests.from_paths.TestFiles.test_solar_sens_chart_py_mosek_conif