populate_metadata module is not under omero*

[manics]

Expected: The populate_metadata module should be under omero*, e.g. import omero.populate_metadata or import omero_metadata.populate_metadata.

Actual: It's at the top level, import populate_metadata

Suggestion: Use the same layout in omero-upload where omero_upload/__init__.py contains the public API methods

[sbesson]

I assume this is now fixed by omero-metadata 0.4.0 and more specifically #19 which moves all modules outside the root namespace into omero_metadata.*