Holodance V0.8pre1: New Music Library aka Song Browser — Holodance Steam update #262970

So this version that I have just pushed to default does away with the old song browser, and now has what we now call "The Music Library". I'm calling the V0.8pre1 because there will be one or two more releases (within the next 24 hours), and then, V0.8 is the official new version of Holodance. If you get to play Holodance today or tomorrow - please let us know if you run into any serious issues! Just post the issue to the forums and I'll keep track of everything. Basically, what the new Music Library gives you us (almost) immediate access to the full library of all ranked osu! maps. So that's approximately 12K songs, 55K beatmaps. You can browse by artist, title and genre (more ways to browse to come). Genre doesn't work as well as it should because that data simply isn't really available, yet. I think it's still useful enough to keep it. We now also have a "random" feature, under "Take ...