added support for selecting multiple nth values
adjust timezone when adding date offsets for DST. fixes #5175
BUG: rolling_count() and expanding_*() with zero-length args; rolling/expanding_apply() with min_periods=0
ENH: add support for datetime.date/time in to_sql (GH6932)
TST: Fix boxplot test for python3
ENH/CLN: add BoxPlot class inheriting MPLPlot
BUG: pivot_table raises KeyError with nameless index and columns
DOC: updated cookbook.rst
Merge pull request #7998 from sinhrks/boxplot

ENH/CLN: add BoxPlot class inheriting MPLPlot
Merge pull request #8098 from sinhrks/gh8091

TST: Fix boxplot test for python3
ER: clarify import error message of BeautifulSoup (read_html)
DOC: fix formatting in dependencies in install.rst
Merge pull request #8111 from jorisvandenbossche/doc-install

DOC: fix formatting in dependencies in install.rst
Merge pull request #8110 from jorisvandenbossche/err-bs

ER: clarify import error message of BeautifulSoup (read_html)
DOC: fix build error in io-sql
Made line comments work with whitespace delim and custom line terminator
fix groupby with tuple bug
Merge pull request #8123 from TomAugspurger/groupby-tuple

BUG: fix groupby with tuple bug
Merge pull request #8090 from jorisvandenbossche/sql-date-time

ENH: add support for datetime.date/time in to_sql (GH6932)
ENH: add schema support to sql functions