DOC/RLS: remove duplicate content in release.rst and move remaining to whatsnew
Merge pull request #7275 from jorisvandenbossche/release-notes

DOC/RLS: remove duplicate content in release.rst and move remaining to whatsnew
DOC: add thanks list to release.rst
RLS: 0.14.0 final
DOC: add whatsnew / release for 0.14.1
BUG: Index.min and max doesnt handle nan and NaT properly
BUG: TimeGrouper doesnt exclude the column specified by key
Merge pull request #7279 from sinhrks/minmax

BUG: Index.min and max doesnt handle nan and NaT properly
Merge branch 'resampleex' of https://github.com/sinhrks/pandas into sinhrks-resampleex

Conflicts:
	doc/source/v0.14.1.txt
CI: add openpyxl 2.0.3 to trigger travis fails on import