Actually include the jquery node_modules shim.
Actually include the jquery node_modules shim.

Summary: I said I was going to do this in the last commit, but never
ended up doing it! It was still laying around though, so my tests didn't
break. :(

Test Plan:
 - Clone this into a bare repo
 - Run `make install; make test` there

Auditors: alex

learningequality/perseus,ariabuckles/perseus,ariabuckles/perseus,learningequality/perseus,ariabuckles/perseus,ariabuckles/perseus