BUG: to_json should raise exception for non-unique index / columns (#4359)
Fix typo.

Change 'highlites' to 'highlights'.
TST/BUG: fix NameError in network decorator
DOC: release notes
CLN: remove some space
Merge pull request #4380 from daydreamt/patch-2

Fix typo.
Merge pull request #4381 from cpcloud/undefined-runs-in-network-decorator

TST/BUG: fix NameError in network decorator
Merge branch 'ujson-unique-keys' of https://github.com/Komnomnomnom/pandas into Komnomnomnom-ujson-unique-keys
DOC: release notes on GH4359 to_json change
ENH: suppress display.height DeprecationWarning
ENH: add git names to test_perf.py

Let users pass nice git names so that they don't have to manually pass sha1
hashes to test between commits.
Merge pull request #4391 from y-p/PR_supress_disp_height_warning

ENH: suppress display.height DeprecationWarning
DOC: update RELEASE.rst
Merge pull request #4392 from cpcloud/test_perf-rev-parse

ENH: add git names to test_perf.py