BUG: (GH4532) Fix bug in having a rhs of np.timedelta64 or np.offsets.DateOffset when operating
     with datetimes
BUG: (GH4134) Fix arithmetic with series/datetimeindex and np.timedelta64 not working the same

TST: add in @cpcloud tests related to GH4135
ENH: GH4521 A Series of dtype timedelta64[ns] can now be divided/multipled by an integer series
DOC/ENH: timedelta conversions & docs

TST: add tests/catch for non-absolute DateOffsets in timedelta operations
Merge pull request #4534 from jreback/td

BUG/API: Fix operating with timedelta64/pd.offsets on rhs of a datelike series/index
DOC: bigger badder warnings on chained assignment
BUG: Fix bug in pd.read_clipboard on windows with PY3 (GH4561); not decoding properly
BUG: Fix incorrect urlparse in _is_s3_url
Merge pull request #4573 from jtratner/fix-url-parse-call

BUG: Fix incorrect urlparse in _is_s3_url
ENH: ujson native datetime serialisation
CLN: pep8-ify json.py
DOC: update json docs for new date behaviour
Merge pull request #4498 from Komnomnomnom/ujson-datetime

JSON native support for datetime encoding
TST: skip buggy io/tests/test_json/test_ujson/test_datetime_units
Merge pull request #4571 from jreback/clip

BUG: Fix bug in pd.read_clipboard on windows with PY3 (GH4561); not decoding properly
micro + nanosecond time support