BUG: fix Series.interpolate() corner cases, close #3674
Added documentation for to_clipboard()
Added a line about same retrieved content
ENH use pyperclip for read and to_clipboard
BUG: allow itertuples to work with duplicate columns
DOC: add release notes and bug fix notes
Merge pull request #3879 from cpcloud/itertuples-bug-3873

BUG: allow itertuples to work with frames with duplicate column names
ENH: do not convert mixed-integer type indexes to datetimeindex
DOC/TST: add test and release notes
Modified to reflect usage of pypaperclip and put all code in one block
fixed typo
FIX hash of NDFrame raises TypeError
BUG: not processing TypeError on reading some json (so was failing rather than trying not-numpy for dtypes)
ENH: added convert_axes argument to control whether to coerce axes

ENH: changed dtype argument to accept a dict for a per-column dtype conversion, or
     turn off conversion (default is True)

ENH: changed parse_dates to convert_dates, now defaulting to True

BUG: not processing correctly some parsable JSON
TST: tests for numpy=True/False differeing in parsing
FIX PandasObjects unhashable
PERF: changed default to numpy=False to have correct parsing using unordered JSON

      eliminated fallback parsing with numpy=True; This will raise ValueError
      if it fails to parse (a known case are strings in the frame data)
Merge pull request #3878 from cpcloud/index-join-date-casting-fix-3877

ENH: do not convert mixed-integer type indexes to datetimeindex
ENH: Add unit keyword to Timestamp and to_datetime to enable passing of

    integers or floats that are in an epoch unit of s, ms, us, ns
    (e.g. unix timestamps or epoch s, with fracional seconds allowed)
    (GH 3540)
TST: disallow slicing a timeseries with floats

TST: manage truediv in py3 for unit comparisons