BUG: apply Timestamp to resultant datetimes when operating on offsets
fixed business day calculation
Added closed parameter to the DatetimeIndex constructor.
BUG: (GH4708) A zero length series written to HDF cannot be read back.
Merge branch 'date_range' of https://github.com/filmor/pandas into filmor-date_range

Conflicts:
	doc/source/release.rst
	pandas/tseries/offsets.py
Merge branch 'AHLRAP-3081' of https://github.com/prossahl/pandas into prossahl-AHLRAP-3081
BUG: allow enlargement to work with empty objects (GH5226)
Merge pull request #5227 from jreback/enlarge_empty

BUG: allow enlargement to work with empty objects (GH5226)
Merge branch 'bdays_fix' of https://github.com/wuan/pandas into wuan-bdays_fix
EHN/FIX: Add na_last parameter to DataFrame.sort. Fixes GH3917