API: add is_beg_month/quarter/year, is_end_month/quarter/year accessors (#4565)

API: add frequency support for is_begin_{}/is_end_{} accessors
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
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
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
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
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
BUG/VIS: correctly test for yaxis ticklocs across different versions of MPL
CI: use mpl 1.3.0 in LOCALE build
ENH: DataFrame constructor now accepts a numpy masked record array (GH3478)
BUG: store datetime.date objects in HDFStore as ordinals rather then timetuples to avoid timezone issues (GH2852),
     thanks @tavistmorph and @numpand
ENH: Better Exception when trying to set on Series with tuple-index.
CLN: replace rwproperty with regular property