Final update before publishing

This is the final, ready-for-release version of the project. I will be working on packaging and publishing it for the next few days.

• Album pages can be exported with album and rating data (new button!)
• Home page has a new (but familiar) layout. Added a background for the search section, creates the sections step-by-step and autoscrolls for a smooth and clear experience. Looks a lot better than the old UI, honestly.
• **Added iTunes Search, using iTunes API. It gives generally different results than MusicBrainz, so you’ll usually find the album you’re looking for in one of them.
• Importing is somewhat functional but causes a lot of issues. This will likely be removed before release.
• Rating comments look better (gray when blank, scrolling for long comments)
• Rating numbers are much easier to type. Previously, the auto-formatting made it annoying to type in your rating. The format has since been fixed, and is much easier to use.
• Rating cells change opacity depending on how well rated the song is. Lowest opacity is 30% for a 0/10 rating, so even 0s are still visible. This makes it much easier to see what songs are rated well/poorly at a glance, and makes the page look much better.
• Misc. bugs were fixed, and more comments were added to the code