Commits

Wes McKinney authored 4108bda82b6
ARROW-1291: [Python] Cast non-string DataFrame columns to strings in RecordBatch/Table.from_pandas Author: Wes McKinney <wes.mckinney@twosigma.com> Closes #911 from wesm/ARROW-1291 and squashes the following commits: d442f3bb [Wes McKinney] Cast non-string DataFrame columns to strings in RecordBatch/Table.from_pandas