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)
ENH: Index(...) constructor creates a MultiIndex when appropriate.
ENH: Series and DataFrame constructor autodetect when index/columns
should be MultiIndex
ENH: prevents some seg faults in calls to cython funcs
(in prog) add tupleize_cols kwarg and update tests to git PR comments
solves one test

and the second test