DOC: some stylistic improvements to docstring rendering in documentation
DOC: correction of example in unstack docstring
CLN: _axis_len checking cleanup and better message
COMPAT: unicode compat issue fix
Merge pull request #4855 from jreback/axis_len

CLN: _axis_len checking cleanup and better message
Merge pull request #4856 from jreback/hdf_unicode

COMPAT: unicode compat issue fix (GH4854)
TST: reproducing tests for subtle PyTables bug (disabled for now), see:
     https://github.com/PyTables/PyTables/issues/282
DOC: show a more informative query performance plot

Corrects the plot to show a larger range of numbers of rows to see where the
Python and NumExpr lines intersect.
Merge pull request #4858 from jreback/hdf_where

TST: reproducing tests for subtle PyTables bug (disabled for now)
DOC: added bitwise op disallow clarification in eval docs
ENH: Better read_json error when handling bad keys

(in json data with orient=split)
Merge pull request #4838 from jtratner/better-error-message-with-bad-json-key

ENH: Better read_json error when handling bad keys
BUG: fix sort_index with one col and ascending list

now actually checks the first element of the list
Merge pull request #4846 from jtratner/GH4839_sort_index_ascending_bug

BUG: fix sort_index with one col and ascending list
DOC: v0.13.0 HDFStore corrections
BLD: fix json to build on windows, @Komnomnomnom
TST: dtypes tests fix for 32-bit
Merge pull request #4860 from jreback/dtypes_fix

TST: dtypes tests fix for 32-bit
BLD: json mingw doesnt have sprintf_s
Merge pull request #4778 from Komnomnomnom/json-win-build-oops

BLD: windows builds failing in pandas.json (#4764)