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
BUG: Fix Segfault with pd.tslib.get_period_field (GH4520)