Fix confusion between config/namespace/scope

Ideally:

 - .config doesn't take a namespace explicitly
 - .namespace requires a namespace
 - .scope is interchangeable

In favor of avoiding extra code, let's alias scope to namespace and not
require namespace to have one.

Signed-off-by: Stephen Celis <stephen@stephencelis.com>
Merge pull request #53 from crepe/scope-namespace-cleanup

Fix confusion between config/namespace/scope