REGR: Regression in multi-index indexing with a non-scalar type object (GH7914)
Merge pull request #7921 from jreback/mi_index

REGR: Regression in multi-index indexing with a non-scalar type object (GH7914)
BUG/DOC: Categoricals now raise NotImplementedError when writing to HDFStore with a Fixed type store (GH7918)
         Slicing bug with a single-dtyped category and a possible view