Fixed issue #4345.
Merge pull request #4360 from nfoti/master

Fix issue #4345: graphics test failure
Fix an issue with the csv cparser when usecols is used
Merge pull request #4406 from tr11/fix_csv_parser_dtypes

BUG: Fix an issue with the csv cparser when usecols is used
BUG: Fix an issue in merging blocks where the resulting DataFrame had partially set _ref_locs (GH4403)
Merge pull request #4410 from jreback/df_rename

BUG: Fix an issue in merging blocks where the resulting DataFrame had partially set _ref_locs
BUG/VIS: fix Series.hist so that users can create hist subplots without the mpl API
ENH: add more informative error message when dupe style and color args are given
Merge pull request #4414 from cpcloud/fix-hist-subplots

BUG/VIS: fix Series.hist so that users can create hist subplots without the mpl API
FIX: revert docs and fix for py3 compat
Merge pull request #4419 from cpcloud/fix-doc-imports

FIX: doc imports
TST: better assertion messages on test failures

CLN: pep8
Merge pull request #4430 from jreback/testing

TST: better assertion messages on test failures (GH4397)
API: GH4409 HDFStore addes an is_open property to indicate if the underlying file handle is_open;
    a closed store will now report 'CLOSED' when viewing the store (rather than raising an error)

API: HDFStore, removed the _quiet attribute, replace by a ``DuplicateWarning`` if retrieving
     duplicate rows from a table (GH4367)

TST: change warnings filter to assert_produces_warning in test_pytables.py

API: removed the warn argument from open. Instead a PossibleDataLoss exception will
     be raised if you try use mode='w' with an OPEN file handle (GH4367)

API: semantics of close in HDFStore now will close that instance of HDFStore
     the final file close is ref counted (by PyTables) w.r.t all of the open handles

ENH: raise ClosedFileError if an operation is attempted on a closed file
DOC: 10min import fixes
Merge pull request #4417 from jreback/hdf_close

API: GH4409 HDFStore adds an is_open property / CLOSED message
DOC: Fix typo

Fixes minor typo in groupby documentation
Merge pull request #4436 from kyleam/groupby-doc-typo

DOC: Fix typo
TST: test updates for testing
Merge pull request #4445 from jreback/hdf_fix

TST: test updates for testing