The go/loader based implementation was too different. Instead
Just call go list twice to get all the dependencies. This immediately
enables more functionality.
Change-Id: I22883492e996133bc61664314318c5e0a9cc10dc
Reviewed-on: https://go-review.googlesource.com/125939
Reviewed-by: Suzy Mueller <suzmue@golang.org>
Reviewed-by: Ian Cottrell <iancottrell@google.com>
Michael Matloob