CLN: fix py2to3 issues in categorical.py
Merge pull request #4990 from jreback/cat_fix

CLN: fix py2to3 issues in categorical.py
TST: fix indexing test for windows failure
Merge pull request #4992 from Komnomnomnom/indexing-dtype-test-fix

TST: fix indexing test for windows failure
BUG: Fix appending when dtypes are not the same (error showing mixing float/np.datetime64) (GH4993)
Merge pull request #4995 from jreback/nat_append

BUG: Fix appending when dtypes are not the same (error showing mixing float/np.datetime64 (GH4993)
API: Remove deprecated Factor (GH3650)
Merge pull request #5000 from jreback/remove_factor

API: Remove deprecated Factor (GH3650)
API: Remove set_printoptions/reset_printoptions (:issue:3046)
API: remove deprecated _verbose_info (GH3215)
ENH: Better string representation for MultiIndex
Merge pull request #4935 from jtratner/multiindex-smart-repr

ENH: Better string representation for MultiIndex
Merge pull request #5001 from jreback/remove_set_printoptions

API: Remove set_printoptions/reset_printoptions (:issue:3046)
BUG: wrong index name during read_csv if using usecols

Closes #4201

If user passes usecols and not names, then ensure that the
inferred names refer to the used columns, not the document's
columns.