Include static partial names in the list of renderables.

[rwjblue]

Addresses #27.

---

There are still some open questions about where exactly a localized partial would go in the new proposal.

Given the following route template (and assuming it was the only usage of the partial):

{{! app/templates/posts/show.hbs }}

<div>
  {{partial "post-display"}}
</div>

Currently, the migrator will make the following layout:

src/ui/routes/posts/show/template.hbs
src/ui/routes/post-display.hbs

This seems non-ideal, but I am unsure what should actually happen here...

[iezer]

According to the spec, the file should go into src/ui/partials/post-display.hbs.