Merge pull request #6500 from toobaz/level_name

DOC: Clarify that methods taking a MultiIndex level index also accept the name
DOC: show users how to emulate R c function with iloc slicing and r_
Merge pull request #6499 from cpcloud/r-slicing-with-c

DOC: show users how to emulate R c function with iloc slicing and r_
TST: windows dtype test fix for tests_indexing/test_imethods_with_dups
Merge pull request #6486 from jreback/reindex

PERF: perf improvements in single-dtyped indexing (GH6484)
PERF: optimize index.__getitem__ for slice & boolean mask indexers
Merge pull request #6440 from immerrr/index-getitem-performance

PERF: optimize index.__getitem__ for slice & boolean mask indexers
BUG: Bug in multi-axis indexing using .loc on non-unique indices (GH6504)
Merge pull request #6506 from jreback/dup_loc

BUG: Bug in multi-axis indexing using .loc on non-unique indices (GH6504)
remove semicolon from CREATE TABLE legacy template

It's not necessary and causes some DB engines to choke (e.g., Impala)
ENH: add method='dense' to rank
DOC: Add common error message to byte-ordering gotcha.
Merge pull request #6521 from danielballan/endian-gotcha

DOC: Add common error message to byte-ordering gotcha.
BUG: fix _ref_locs corruption when slice indexing across columns axis
Merge pull request #6525 from immerrr/fix-df-column-slice-indexer

BUG: fix DataFarame column slice indexer
BUG: Regression from 0.13 in the treatmenet of numpy datetime64 non-ns dtypes in Series creation (GH6529)
Merge pull request #6530 from jreback/datetime_convert

BUG: Regression from 0.13 in the treatmenet of numpy datetime64 non-ns dtypes in Series creation (GH6429)
BUG/API groupby head and tail act like filter, since they dont aggregage, fixes column selection
ENH: Preserve .names in df.set_index(df.index)

Preserve .names in df.set_index(df.index)

Check that df.set_index(df.index) doesn't convert a MultiIndex to an Index

Handle general case of df.set_index([df.index,...])

Cleanup

Add to release notes

Add equality checks

Fix issue on 2.6

Add example to whatsnew
informative error message