Gotachas -> Gotchas
Merge pull request #4762 from rgbkrk/patch-1

Gotachas -> Gotchas
Merge pull request #4761 from jreback/dt_multi

BUG: in multi-indexing with a partial string selection (GH4758)
BUG: Bug with reindexing where a non-unique index will now raise ValueError (GH4746)
CLN: refactored out take from core/frame.py to use core/generic.py version