Update arrow parquet to match Arrow 0.3 (#96)
Update arrow parquet to match Arrow 0.3 (#96)

Arrow added support for partitioned datasets in Parquet and changed the
Parquet reading interface. This code uses the new ParquetDataSet class
to read from multiple Parquet files.
quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt-compiler,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt,quiltdata/quilt-compiler,quiltdata/quilt,quiltdata/quilt