BUG: apply Timestamp to resultant datetimes when operating on offsets
CLN/ENH: Stop instantiating all offsets on load.

Use a more flexible lookup based on prefix then delegate creation to
class' `from_name()` method. Totally get rid of hasOffsetName (not necessary).
Finally, make some inheriting go on to simplify things.
API: rename _prop_attributes to __finalize__ (in NDFrame)
     rename _propogate_attributes to _metadata (in NDFrame)
     change methods which directly pass metadata to use __finalize__

     These provide a simple mechanism for meta data propagation, which
     can be overriden in subclasses if desired
fixed business day calculation
Updated Documentation for Google BigQuery Module, and Added to_gbq to frame.py
BUG: Groupby filter maintains ordering, closes #4621
Merge pull request #5222 from danielballan/filter-maintains-ordering

BUG: Groupby filter maintains ordering, closes #4621
Merge pull request #5179 from jacobschaer/master

GBQ: Updated Documentation, and added method to generic.py
Merge pull request #5205 from jreback/meta

API: rename _prop_attributes to __finalize__ (in NDFrame)
Merge pull request #5189 from jtratner/stop-instantiating-offsets-on-load

CLN/ENH: Stop instantiating all offsets on load.
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
TST/PERF: Re-write assert_almost_equal() in cython #4398

Add a testing.pyx cython file, and port assert_almost_equal() from
python to cython.

On my machine this brings a modest gain to the suite of "not slow" tests
(160s -> 140s), but on assert_almost_equal() heavy tests, like
test_expressions.py, it shows a large improvement (14s -> 4s).
TST: Fix edge cases in assert_almost_equal() + tests #4398

Many of the edge cases were related to ordering of the items, but in
some cases there were also issues with type checking.  This fixes both
of those issues and massively expands the testing for this function.
CLN: Make the name of the test file more accurate