Add taglib to project to get extra cover data(and possibly replace libgroove for this function). Remove oggs from accepted files until I can figure out cover data for them better. Add non-persisted field for this to audiotrack object and method to add this data to it in memory.

Add code to add track to DB and remove old ones that are gone. Added fingerprint lib to link for id-ing tracks. Make sure DB is logical after these changes. Change music path due to complaints I don't quite understand.