SQLite

[martpie]

Fixes #793

via the awesome ormlite.

• [x] MVP
• [x] Fix tables not created on startup https://github.com/kurtbuilds/ormlite/issues/56
• [x] Add Indices
• [x] Add transactions/batching for:
  • [x] database reset (or use raw SQL)
  • [x] inserting tracks
• [x] Implement reset
• [x] Check that everything works

[martpie]

Got a working version, 4000 tracks load in 50ms. Insertion and deletions don't need transactions (inserting all 4000 tracks sequentially is almost instant).

Looking good so far :) Some weird edgecases though with ormlite, stuff not well exposed, but so far so good.

[martpie]

Erratum: inserting 4000 tracks take 2 seconds, which is good enough. Deleting and vacuuming takes 5 sevconds clearing the records one by one, so I just used one statement to delete everything, which is instant, but less type safe