clarify namespace workflow

[davidchambers]

outline/first-program.md:

A namespace exists in the file src/global_growth/core.clj. Open it, and find this line:

(ns global-growth.core)

This is followed by instructions on requiring dependencies.

Confusingly, the aforementioned file already requires the dependencies, so no changes are necessary. We could either:

• update the template to match the documentation; or
• update the documentation to match the template.

Which approach is preferable? I'll put together a pull request once we've decided. :)

[bridgethillyer]

I'd say update the documentation.