majalan

Copperbox revision 2858.

I've added a few more GEN routines. The only one that is interesting from an embedding perspective is GEN11 which has optional arguments. I've chosen to require all arguments - the documentation lists the default values.

Optional arguments are more heinous in orchestras than scores, where there are fewer primitives that make use of them. As this is the only occurrence I've found so far, requiring all which doesn't restrict expressiveness seems the best solution.