assets should be stored in assets/assets instead of app/assets database/table

[raffaelj]

I'm working on a migrate script (v1 to v2) right now and I was confused about finding the assets meta data in app.sqlite instead of assets.sqlite. Is this intended?

If not, I would suggest to add at least a cli command for moving them from app/assets to assets/assets with a big red warning in the changelog.

Alternatively - and to not break existing installations, the core code could be changed to the assets db with a fallback to the app db. This fallback could be removed a few versions later.