this might help Twitter's internal Pants to see the resources useful for markdown goal

Inside Twitter, './pants goal markdown' fails trying to load the page.mustache resource file.
But './pants goal builddict' works, and I know that uses resources.
I see that when TDesai fixed some resource-breakage, she edited this section.
And I see that this section mentions templates/builddictionary but not templates/markdown, so I'm hopeful; even though I'm vague about some (most?) parts of the pants->internal pants ritual.

Testing Done:
https://travis-ci.org/pantsbuild/pants/builds/32912323

Bugs closed: 498

Reviewed at https://rbcommons.com/s/twitter/r/918/