Neume

Copperbox revision 1426.

I've added the Bracket module to the Neume fork. At some point I'll recode it as it won't work with the various phrase formats.

Also in wumpus-clave - one of the source files ClaveMonad.hs was missing (but in my local repo), I've now added it.


Copperbox revision 1427.

Updates to Neume/Core/ModularSyntax.hs that should have gone in the last commit.