#24 Alias can cause duplicate keys to return

[Daniel Rupe]

Scenario:

Call getMetadata("CaptureConditions.Aperture").

Then call getMetadata("*", false) with an alias loaded that contains the same key
(CaptureConditions.Aperture).

Notice that CaptureConditions.Aperture is listed twice in the returned key list.

Cause:

getMetadataTopLevelPath() calls getMetadataPath() first, then calls getMetadataAlias().

Potential solution:

Maybe we can have the alias code inspect the list, before inserting any keys.