Fix Issues with FY5253 and variation=nearest w/ year end in Dec
Reordered DateOffset classes after merge
Added failing test case for resampling TimeSeries by period with a local timezone.

Related to #5340.

Signed-off-by: Kevin Stone <kevinastone@gmail.com>

Added Test Case for #3609.

Signed-off-by: Kevin Stone <kevinastone@gmail.com>

Fixes Grouping by Period with Timezones

The timestamp generated to partition the data frame doesn't include timezone information, so it was creating the wrong groups.  It also had the frequency ('D') hard coded.

Fixes #5340 and #3609.

Signed-off-by: Kevin Stone <kevinastone@gmail.com>
ENH: Better handling of MultiIndex with Excel

Added merged cell formatting for MultiIndex and Hierarchical Rows.
Issue #5254.
API: raise SettingWithCopy when chained assignment is detected
Merge pull request #5432 from kevinastone/master

BUG: fix Resampling a Series with a timezone using kind='period' (GH5430)
Merge pull request #5423 from jmcnamara/enh_excel_multi_index

ENH: Better handling of MultiIndex with Excel
PERF: Use xlsxwriter by default (if available)
DOC: fix build error in to_latex and release notes
Merge pull request #5447 from jorisvandenbossche/docs-to_latex-error

DOC: fix build error in to_latex and release notes
Merge pull request #5448 from jreback/hdf_decode

PERF: Fixed decoding perf issue on py3 (GH5441)
DOC: remove docstring of flags attribute during doc building process (#5331)
Merge pull request #5450 from jorisvandenbossche/docs-flags-remove-docstring

DOC: remove docstring of flags attribute during doc building process (#5331)
DOC: small error in cookbook (doc build warning)
Merge pull request #5454 from jorisvandenbossche/patch-1

DOC: small error in cookbook (doc build warning)
BUG: Excel writer doesn't handle "cols" option correctly

Added fix to ensure that Series associated with column
names are handled correctly even if names are duplicated
or swapped. Issue #5427
Merge pull request #5429 from jmcnamara/bug_excel_cols_option

BUG: Excel writer doesn't handle "cols" option correctly
Merge pull request #5390 from jreback/chained

API: raise/warn SettingWithCopy when chained assignment is detected
BUG: pd.to-timedelta handles missing data
Merge pull request #5438 from danielballan/to-timedelta-missing-data

BUG: pd.to_timedelta handles missing data