Package is a golang.org/x/..

Use go-list to load all packages and build the initial tree We load as many packages as we can at once - and pick up any "unimported" packages (packages that were imported by source files not marked for build under the present system) Any unimported packages we then go and load ourselves (and continue this process until all packages are loaded).

Fields that are commented out are provided by go-list however that are not need by wharf so leave them commented out in case they ever do become useful.