Use default dub for empty string as well.
Added error element archetype.
Refactor IScopeElement API.
Rename and merge some tests.
Fixed tests regression.
Changes to how resolution of missing module imports is handled.
Minor preparation cleanup.
More intermediate refactoring.
Yet more intermediate refactoring.
Added initial implementation of package namespace overload.
Initial implementation of full Package namespaces.
Refactor some tests.
More tests, made import's implicit namespace resolve in main scope,
instead of imports one.
Removing duplicate module elements, tests.