Implement .norm() and to/from_polar() for complex numbers.#7050

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huonw wants to merge 2 commits intorust-lang:incomingfrom

huonw:extra-complex-work

Commits on Jun 11, 2013

std: convert pow, hypot, atan2, log to take arguments by reference.
huonw
committed
extra: implement .norm(), and Polar conversion functions for complex numbers.
huonw
committed