Implements Kahan's versions of elementary complex functions#2891

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JeffBezanson merged 7 commits intomasterfrom

jh/kahan-complex

May 30, 2013

Commits on May 19, 2013

Merge branch 'master' of github.com:JuliaLang/julia into jh/kahan-complex
JeffBezanson
committed

Commits on May 20, 2013

complex function improvements; make test-complex pass
JeffBezanson
committed
Merge branch 'master' of github.com:JuliaLang/julia into jh/kahan-complex
JeffBezanson
committed