* An initial (not yet working) implementation with test
* Added custom (non-bip-340) verification for now
* Made KeySet a case class
* Got MuSig2 working with BIP340 verification passing
* Responds to Ben's review
* Fixed hash tags and added parital signature verification
* Added point multiplication that allows infinity and did some refactoring
* Refactored type defs into case classes
* Added tests for more signers and fixed single-party bug
* Added key aggregation test vectors from BIP
* Added nonce generation test vectors from BIP
* Added nonce aggregation test vectors from BIP
* Made nonce aggregation test vectors pass by having MultiNoncePub wrap SecpPoints
* Added remaining static test vectors from BIP
* Implements tweaking support and adds tests, including all of the remaining BIP tests
* Added factory objects for nonce types
* Refactored things into multiple files with renaming and restructuring
* Some minor renaming
* Introduced ParityMultiplier ADT to remove unneccesary computations
* Added scaladocs
* Added messages to invariants
* Fixed a typo
* Nonce generation now takes a SchnorrPublicKey instead of raw bytes
* Made point multiplication more robust
* Responded to Ben nits
* Added musig.md
