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