DOC: small fixes categorical docs
DOC: Fix release note for GH7798
REGR: Regression in multi-index indexing with a non-scalar type object (GH7914)
Merge pull request #7920 from sinhrks/rn7798

DOC: Fix release note for GH7798
Merge pull request #7917 from jorisvandenbossche/docs-categorical-fixes

DOC: small fixes categorical docs
Merge pull request #7921 from jreback/mi_index

REGR: Regression in multi-index indexing with a non-scalar type object (GH7914)
API/COMPAT: Index no longer an ndarray sub-class (GH5080)

CLN: add searchsorted to core/base (GH6712, GH7447, GH6469)

fixup tests in test_timeseries for reverse ndarray/datetimeindex comparisons

fix algos / multi-index repeat (essentially this is a bug-fix)

ENH: add NumericIndex and operators, related (GH7439)

DOC: indexing/v0.15.0 docs

TST: fixed up plotting issues
COMPAT/API: use __array_priority__ to facility proper comparisons of DatetimeIndex with ndarrays

fixup to do actual views in copy (except in reduce where its needed)

COMPAT: fixes for pickle testing

COMPAT: numpy compat with 1.6 for np.may_share_memory

FIX: access values attr in JSON code to support index that's not an ndarry subclass