DOC: expand gotchas/basics on boolean reductions
ENH: support timedelta64[ns] as a serialization type in HDFStore for query and append (GH3577)
CLN: refactored locations of timedeltas to core/tseries/timedeltas (from a series of functions in core/common)
TST: add pandas/tseries/tests/test_timedeltas.py
API: add full timedelta parsing and conversion to np.timedelta64[ns]
ENH: add top-level to_timedelta to convert string/integer based to timedeltas
Merge pull request #4822 from jreback/timedelta_hdf

ENH/CLN: support enhanced timedelta64 operations/conversions
PERF: much faster to_datetime performance with a format of '%Y%m%d'
Merge pull request #4826 from jreback/dunit

PERF: much faster to_datetime performance with a format of '%Y%m%d'
BUG: enhanced to_datetime with format '%Y%m%d' to handle NaT/nan and NaT-like better
Merge pull request #4828 from jreback/dunit2

BUG: enhanced to_datetime with format '%Y%m%d' to handle NaT/nan better
TST: tests for GH4812 (already fixed in master)
Merge pull request #4813 from jreback/dup_resample

TST: tests for GH4812 (already fixed in master)
ENH: Add 'add_metaclass' class decorator.

Taken from a new addition to the six library (again, license is in the
LICENSE directory).
CLN: Make ExcelWriter more pluggable

Make ExcelWriter an ABC and add ExcelWriter config to core/config_init

ENH: Allow Panel.to_excel to pass keyword arguments
Merge pull request #4750 from jtratner/refactor-excel-writer

CLN: Make ExcelWriter more pluggable
BUG: allow DataFrame constructor to accept more list-like objects, e.g. list of
    `ollections.Sequence and array.Array objects (GH3783 and GH42971)
TST: explicity tests for iterator/generator types in DataFrame/Series construction

ENH: add generator support in DataFrame constructor
Merge pull request #4829 from jreback/seq

ENH/API: allow DataFrame constructor to better accept list-like collections (GH3783,GH4297)
BUG: Fix compressed files in Py3 to return str

Fixed bug with reading compressed files in as `bytes` rather than
`str` in Python 3. `gzip` and `bz2` both now return `bytes` rather
than `str` in Python 3, so just needed to wrap them in an
`io.TextIOWrapper` to make everything work.

Only wrap BytesIO and compressed streams

Read entire compressed file in 3.2 to get around inconsistencies with TextIOWrapper
Merge pull request #4783 from jtratner/wrap-compressed-fileobjects-in-py3

BUG: Fix input bytes conversion in Py3 to return str