$:unquote takes three arguments (term and left and right quotes.)
Syntax for modules.  : defeats aliases.  Ugly parser code!
Modules can be defined.  You just can't use them yet.
Interpreter can handle rudiments of modules.  Compiler can't.
Now the compiler handles modules (badly) too.
Catchup implementation in Tamsin.  Bit of a stumper now, though.
Work around it for now so that all tests pass. :/