FIX refactor annual_return to return CAGR. Removes returns_style para…#234

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justinlent wants to merge 3 commits intomasterfrom annual_return_refactor

+33-58

Commits on Dec 3, 2015

FIX refactor annual_return to return CAGR. Removes returns_style parameter from signature.
Justin Lent
committed

Commits on Dec 8, 2015

FIX refactor perf_stats by removing returns_style parameter from signature to support refactored annual_return.
Justin Lent
committed
FIX unittests to support refactored annual_return
Justin Lent
committed