BUG: tzinfo lost when concatenating multiindex arrays
TST: Add layout tests for boxplot
BUG: Easter works incorrectly in negative offsets
BUG: CustomBusinessDay apply raises NameError when np.datetime64 is passed
ENH: Add dateutil timezone support GH4688

Adds support for dateutil timezones across pandas.
Support conversion between dateutil and pytz timezones.
Ensure timezone functionality is tested with both dateutil and pytz.
Merge pull request #7195 from sinhrks/easter

BUG: Easter works incorrectly in negative offsets
BUG: Bug in broadcasting with .div, integer dtypes and divide-by-zero (GH7325)
Merge pull request #7328 from jreback/div_error

BUG: Bug in broadcasting with .div, integer dtypes and divide-by-zero (GH7325)
Merge branch 'custombd' of https://github.com/sinhrks/pandas into sinhrks-custombd

Conflicts:
	doc/source/v0.14.1.txt
Merge branch 'concattz' of https://github.com/sinhrks/pandas into sinhrks-concattz

Conflicts:
	doc/source/v0.14.1.txt
BUG StringMethods on empty series (GH7242)

- all StringMethods are tested and work on empty seires
- moreover extract always returns dtype==object, even when no match is
  found
Merge pull request #6968 from ahlmss/AHLMSS_0.13.1_ahl1

ENH: Support dateutil timezones. GH4688.
BUG: already mixed indexes should not sort
UNI/HTML: add encoding argument to read_html
Merge pull request #7323 from cpcloud/html-encoding

UNI/HTML/WIP: add encoding argument to read_html
FIX resample with fill_method and how #2073

DOC add to release notes
Merge pull request #7159 from sinhrks/boxtest

TST: Add layout tests for boxplot
PERF: add dtype inference vbenches (GH7332)

PERF: recognize int64 to timedelta64[ns] conversions and perform faster

PERF: use names/kinds for dtype inference on known types

DOC: performance docs
COMPAT: tests compat with current timezones (pytz) (GH7339)
Merge pull request #7341 from cpcloud/hayd-gh2073

FIX: resample with fill_method and how #2073