Support for s3 file handling
Update README and RELEASE for new S3 support
Update io.rst

added io.read_html
ENH: HDFStore will retain index attributes (freq,tz,name) on recreation (GH3499_)

TST: added legacy_table_0.11 table and tests
ENH: support timezone data_columns in HDFStore (GH2852)

DOC: update release notes/whatsnew, added whatsnew 0.11.1 to index.rst

ENH: warn a FrequencyWarning if appending with a different frequency that existing
BUG: Fixed bug in selecting month/quarter/year from a series would not select the time element

     on the last day (GH3546_)
Merge pull request #3548 from jreback/GH3546

BUG: Fixed bug in selecting month/quarter/year from a series would not select correctly (GH3546)
Merge pull request #3531 from jreback/hdf_bug

ENH: HDFStore enhancements
BUG: GH3416 properly convert np.datetime64 objects in the _possibily_convert_datetimes
CLN: _possibily_convert_datetimes now uses to_datetimes internally
BUG: fixes GH3425, raising on passed invalid dtypes for datetimelike

     fixes GH2423, astyping is now checked when using datetimelike and timedeltalike
     for valid astype to dtypes

BUG: PY3 compat for timedelta64[ns] in astype

BUG: more py3 compat

PTF
PERF: HDFStore append optimize

PERF: hdf performance by doing recarray translation in cython

PERF: incremental faster
Merge pull request #3537 from jreback/hdf_optimize

PERF: HDFStore table writing performance improvements
Merge pull request #3516 from jreback/GH3416

BUG/CLN: datetime64/timedelta64
BUG/TST: fixed up retaining of index names in the table .info (like freq/tz)
Merge pull request #3549 from jreback/hdf_bug2

BUG/TST: fixed up retaining of index names in the table .info (like freq/tz)
BUG: raise on invalid operations for timedelta/datetime

     e.g. can't add 2 datetimes, nor multiple timedelta * datetime

BUG: added correct div operaters and don't fail in py3
Merge pull request #3550 from jreback/ts_bug

BUG: raise on invalid operations for timedelta/datetime
BUG: Fix ``.diff`` on datelike and timedelta operations (GH3100_)
Merge pull request #3554 from jreback/GH3100

BUG: Fix .diff() on datelike and timedelta operations (GH3100_)