Added tuple module (so far just stuff for pairs) to hold all the unary and binary method converters, and be ready for 3- and 4-tuples (at least) should the need arise; added a few more function to complex numbers and restructured cache stuff a little more (for one thing, to piggyback a generic complex constructor on the stuff, which can remain unaware of caching completely); cross-origin stuff in the CMV module... all that's left is the big churn of complex arithmetic, now :)