Complex and numeric test additions

[Brian T. Rice]

Patch applied. Thanks!

Ken Causey wrote:

> This patch adds the following methods:
> 
> c1@(Complex traits) isCloseTo: c2@(Complex traits)
> 
> c@(Complex traits) isCloseTo: n@(Number traits)
> 
> n@(Number traits) isCloseTo: c@(Complex traits)
> 
> and adds to the isCloseTo: test to test these and fleshes out most of
> the other numeric tests that were blank.  I would finish up but am
> expected at my mother's for dinner shortly.  I'll finish it in the
> morning probably.
> 
> Ken

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