* Updates and moves spec/fixtures/artesia_ingest/teams_asset_file.zoom_sample.xml to spec/fixtures/artesia_ingest/zoom/teams_asset_file.xml.
* Creates individual fixtures for each <UOIS> from spec/fixtures/artesia_ingest/zoom/teams_asset_file.xml, which correspond to the OpenvaultAsset types.
* Updates tests to match new fixture filenames and data.
* Adds tests for protected methods ArtesiaIngest#generate_openvault_assets and ArtesiaIngest#relate_openvault_assets.
* Adds pending tests for testing each OpenvaultAsset type.
* Updates Guardfile to watch for changes to fixtures and run appropriate tests.

Closes #80.