FIX: to_sql dtype argument accepting SQLAlchemy type instance (GH9083)
PERF: Utilize mixed dtype information in df.count()
BUG: Bug in Panel indexing with an object-like (GH9140)
Merge pull request #9138 from jorisvandenbossche/sql-9083-dtype-no-subclass

FIX: to_sql dtype argument accepting SQLAlchemy type instance (GH9083)
PERF: json support for blocks GH9037
Merge pull request #9143 from jreback/panel_indexing

BUG: Bug in Panel indexing with an object-like (GH9140)
Merge pull request #9130 from Komnomnomnom/json-block-support

PERF: json support for blocks GH9037
Merge pull request #9136 from qwhelan/master

Remove codepath asymmetry in dataframe count()
improves merge performance when key space exceeds i8 bounds