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Wes McKinneyPhilipp Moritz
166f0a87148
Wes McKinney authored and Philipp Moritz committed ee78cdcb1c4
ARROW-1503: [Python] Add default serialization context, callbacks for pandas.Series/DataFrame

The performance is a bit slower than it could be because we do not have native handling of pyarrow.Buffer (per ARROW-1522). That would allow us to skip the `to_pybytes` copy portion

Author: Wes McKinney <wes.mckinney@twosigma.com>

Closes #1192 from wesm/ARROW-1503 and squashes the following commits:

a36f97d [Wes McKinney] Add default serialization context and add serialization callbacks for pandas Series, DataFrame
5ff10f4 [Wes McKinney] stubs for handling Series, DataFrame more efficiently by default in serialization code paths