Run Makefile to generate the docs. This is a huge, kludgy approach to the problem of reusing documentation from Racket for WeScheme, in the sense that we essentially copy-and-paste the content. We try to be good about it by doing this copy-and-pasting structurally rather than textually, but this is still not great. Note that this expects to be run under DrRacket 5.3.2. Some of the processing we're doing is very sensitive to the exact English prose used in the documentation of Racket, so if we use another version, there are probably a few things that will need adjustment.