Metadata Aggregator: Better export filenames

Exported file names now match the imports on Drupal, hopefully making it less complicated

Metadata Aggregator: Auto-guess db location

This release automatically tries to find the location of the CSDCO sqlite database and auto-populate that field, hopefully saving a lot of file tree navigating

First release of CSDCO Metadata Aggregator

First release of our internal-use metadata aggregator!