TST: checked for DeprecationWarning on tests for backwards compatability logic
BUG: Bug in Series.get, was using a buggy access method (GH6383)
CLN: Change assert_(a is [not] None) to specialized forms

Work on #6175. Changes instances of assert_(a is [not] None) to specialized assertIs[Not]None(a).
Merge pull request #6385 from jreback/get_bug

BUG: Bug in Series.get, was using a buggy access method (GH6383)
Merge branch 'pytables_backwards_compatability' of https://github.com/hhuuggoo/pandas into hhuuggoo-pytables_backwards_compatability

Conflicts:
	doc/source/release.rst
Merge pull request #6386 from bwignall/assert_6175_newAsserts_3

CLN: Change assert_(a is [not] None) to specialized forms
CLN: Specialize assert_(np.array_equal(...))

Work on #6175. This is the third (and final) "half" of the work started in #6368.
BUG: Bug in DataFrame.dropna with duplicate indicies (GH6355)
Merge pull request #6388 from jreback/dups_dropna

BUG: Bug in DataFrame.dropna with duplicate indices (GH6355)
DOC: add cookbook example for reading in simple binary file formats
Merge pull request #6390 from cpcloud/cookbook-read-bin-6305

DOC: add cookbook example for reading in simple binary file formats
Fix behavior of `to_offset` with leading zeroes

Currently, `pandas.tseries.frequencies.to_offset` erroneously returns a zero time offset when the first part of its argument has a numerical value of zero, even if later parts have nonzero values.  For instance,

    In [123]: pandas.tseries.frequencies.to_offset('00H 00T 01S')
    Out[123]: <0 * Days>

In this patch the sign check is applied before conversion to `int` in order to support offsets like `'-00H 00T 01S'`.
API/CLN: add in common operations to Series/Index, refactored as a OpsMixin
         (GH4551, GH4056, GH5519)
TST: Add tests for `to_offset` with leading zeroes

Test for the issues fixed by cbc8c73fdf617a4644baa130dff05476c7a61645.
Merge pull request #6380 from jreback/common_ops

API/CLN: add in common operations to Series/Index, refactored as a OpsMixin
Merge pull request #6387 from bwignall/assert_6175_arrayequal_3

CLN: Specialize assert_(np.array_equal(...))
CLN: Change assert_(a is [not] b) to specialized forms

Work on #6175. Changes instances of assert_(a is [not] b) to specialized assertIs[Not](a, b).
Merge pull request #6392 from bwignall/assert_6175_isisnot

CLN: Change assert_(a is [not] b) to specialized forms
CLN: Change assert_(a [not] in b) to specialized forms

Work on #6175. Changes instances of assert_(a [not] in b) to specialized assert[Not]In(a, b).
BUG: Regression in chained getitem indexing with embedded list-like from 0.12 (6394)