BUG: loc was failing on integer slices (incorrect implementation), GH 3053
Merge pull request #3055 from jreback/loc

BUG: loc was failing on integer slices (incorrect implementation), GH 3053
ENH: improve performance of df.to_csv GH3054
BUG: Handle concat of series with same name, GH2972
Merge pull request #3050 from jreback/numerics_3037

ENH: Allow setitem in a frame where only mixed numerics are present
Merge pull request #2860 from y-p/GH2439

BLD: bring back build_ext warning message cython is missing #2439
Merge pull request #3005 from y-p/GH3000

 df.from_records should accept values deriving from ABC collections.Mapping #3000
Merge pull request #2991 from y-p/GH2877

ENH/BUG: add tz argument to to_timestamp of Period GH2877
ENH: to_csv using masking to simplify dtype processing
ENH: more perf tweaks in df.to_csv
Merge pull request #3058 from dieterv77/FixGH2972

BUG: Handle concat of series with same name, GH2972
ylabels for secondary_y axis

modified Selective Plotting on Secondary Y-axis example to show how to set ylabels for both left and right y axis
PERF: cythonized parts of to_csv for increased perf
PERF: more cython tweaks
PERF: cythonize improved python version
PERF: cythonized parts of to_csv for increased perf
PERF: more speedups
ENH: add chunksize parameter to DataFrame.to_csv to enable constant memory usage
     by writing in chunks
CLN: move repeated cast out of loop
CLN: make guard more defensive