BUG: Bug in multi-index slicing with missing indexers (GH7866)
PERF: groupby / frame apply optimization
NETWORK: change failing FRED test
Merge pull request #7881 from jreback/apply_optimize

PERF: groupby / frame apply optimization
ENH: Add optional level argument to set_names(), set_levels() and set_labels() (GH7792)
BUG/FIX: gut groupby.filter code, raise on multi-valued filter
Merge pull request #7871 from cpcloud/groupby-filter-fix

BUG/FIX: groupby should raise on multi-valued filter
Merge pull request #7867 from jreback/mi_loc

BUG: Bug in multi-index slicing with missing indexers (GH7866)
Fix the OSX test failing thing.

This is my first try at a commit.
I will have to go back and fix it later.