Spotify & audioDB results should be checked

[Sheraff]

Lastfm & acoustid results are validated by a string distance algorithm similarStrings to increase the certainty that they match the requested track.

• The same should be done for spotify track searches.
• The same should be done for audiodb searches that are not based on MBID

Where a better "result selection" is needed, there are // TODO: use string distance comments. Though, the proper way of selecting a result might not simply be string distance but something more along the lines of what is done w/ acoustid results.

Potentially:

• Select lastfm result w/ better algorithm (similar to what is done w/ acoustid results), marked with // TODO: can we do better

[Sheraff]

23bfe7a

=> uses string distance to select result for spotify & audiodb (does not filter out, only used to select the best one)

[Sheraff]

d964771

=> lastfm name correction is checked by a string distance on track creation