Handling multiple files with multiple content items for each

[shadyvb]

Note: There is no current need for this, just noting for future consideration.

Currently the importer handles either of the following scenarios:

1. Single file with multiple content
2. Multiple files each with a single content item

This can be worked around by using a loop in terminal, but then it'll not produce an overall view of the imported content, and that would not be very helpful.