Consolidate rake tasks

[afred]

Done when: rake tasks are consolidated.

Unless there's a reason not to?

[afred]

Rake tasks at the gem-level are included in the gem's Rakefile, but not in the host app when Rails.application.load_tasks is called.

IOW, it's an elegant way to separate rake tasks only needed when developing the gem, versus rake tasks you want to expose to the host app.

So the separation is legit. Closing.