Merge pull request #4238 from Komnomnomnom/ujson-fudgy-test

TST: remove fudgy ujson test #4223
TST: force rebuild
BLD: use wheels and newer scipy bc of 33 scipy issue
Merge pull request #4240 from cpcloud/scipy-wheels

BLD: use wheels and newer scipy bc of py33 scipy issue
CLN: replace __repr__ with __unicode__ for string printing (to use StringMixIn)
Merge pull request #4241 from jreback/hdf_print

CLN: replace __repr__ with __unicode__ for string printing (to use StringMixIn)
DOC: Fix typos in CONTRIBUTING.md
ENH: implement non-unique indexing in series (GH4246)

DOC: release notes
Merge pull request #4247 from jreback/series_dups

API: implement non-unique indexing in series (GH4246)
BLD: use mpl 1.1.1 in python 2.7 production travis build
Merge pull request #4243 from kjordahl/master

DOC: Fix typos in CONTRIBUTING.md
Merge pull request #4248 from cpcloud/mpl-1.1.1-build

BLD: use mpl 1.1.1 in python 2.7 production travis build
BUG: remove six import
ENH: Add `isin` method to DataFrame.

docs. to be rebased

ENH: Add isin method to DataFrame

Basic tests.

Added method and fixed tests.

ENH: Add ordered argument to df.isin()

Expects a sequence of arrays.

Updated release notes for df.isin()

CLN: cleanup

going to remove ordered argument.

Using a dict for ordered matching. Docs

BUG: fixed subselection length check issues.

Updated release notes for df.isin()

remove merge conflict note
ENH tweak DataFrame isin method
Merge pull request #4250 from cpcloud/six-fix

BUG: remove six import
TST: no need for flavor testing in skip

Skip bs4 tests when 4.2.0 is found.
DOC: add v0.13.0.txt release notes file (but not to the index yet)
Merge pull request #4257 from cpcloud/read-html-flavor-attr

TST: no need for flavor testing in skip
ENH add iloc argument to DataFrame isin