Reactive Music

Here's a pretty big update for Reactive Music!

General Updates:

• Updated the built-in songpack with new songs, more variety, and better handling of some harsh transitions between nether/underground/etc.
• Fixed music breaking when hitting an invalid song or switching songpacks too quickly.
• Made songpacks with errors still able to load if those errors are non-critical

Songpack Creation:

• Added ~50 new songpack events you can use in the form of biome tags. You can find the full list of new tags here!
• Updated the songpack template to show usage examples.