BUG/API groupby head and tail act like filter, since they dont aggregage, fixes column selection
BUG: fix fancy indexing with empty list
DOC add groupby head and tail to docs
Merge pull request #6533 from hayd/groupby_head

API change in groupby head and tail
BLD: change wheel url to pandas.pydata.org
BLD: remove scikit-timeseries from the deps and builds
BLD: numpy_master bld to use lastest pytz/python-dateutil
Merge pull request #6567 from jreback/versions3

BLD: change wheel url to pandas.pydata.org
BLD: add bottleneck 0.8.0 to 3.3 build
Merge branch 'fix-fancy-indexing-empty-list' of https://github.com/immerrr/pandas into immerrr-fix-fancy-indexing-empty-list

Conflicts:
	doc/source/release.rst
BUG: Series.quantile raising on an object dtype (GH6555)
ENH: Allow timestamp and data label to be set when exporting to Stata

Added code which allows the time stamp and the data label to be set using
either StataWriter or to_stata.  Also simplified reading these values using
StataReader by removing null bytes from the string values read.

Added basic test for both.

Also fixed one small bug where variables could be stored using Stata reserved
words.
BUG: preserve frequency across Timestamp addition/subtraction (#4547)
Merge pull request #6558 from jreback/quantile_object

BUG: Series.quantile raising on an object dtype (GH6555)
Merge pull request #6553 from bashtage/time_stamp-data_label-reserved_words

ENH: Allow timestamp and data label to be set when exporting to Stata
Merge pull request #6560 from rosnfeld/issue_4547

BUG: preserve frequency across Timestamp addition/subtraction (#4547)