Adds triangular option to DataFrame.corr, closes #22840#22842

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dsaxton wants to merge 9 commits intopandas-dev:masterfrom

dsaxton:corr-tri

Commits on Sep 26, 2018

modify DataFrame.corr to allow lower triangular correlation matrix
Daniel Saxton
committed
add test for DataFrame.corr(tri=True)
Daniel Saxton
committed
PR #22840
Daniel Saxton
committed
PR #22840
Daniel Saxton
committed
PR #22842
Daniel Saxton
committed
PR #22840
Daniel Saxton
committed

Commits on Sep 27, 2018

modify DataFrame.corr to allow triangular correlation matrix
Daniel Saxton
committed
PR #22842: rebase
Daniel Saxton
committed

Commits on Sep 28, 2018

PR #22842: add to DataFrame.corr docstring
Daniel Saxton
committed