Bulk Operation

ARROW-1644 [C++][Parquet] Create reading benchmarks for 2-level nested data

ARROW-1644 [C++] Investigate performance of LevelsToBitmap without BMI2

ARROW-1644 [C++] Add Parquet-Arrow roundtrip tests for nested data

ARROW-1644 [C++][Parquet] Create nested reading benchmarks

ARROW-1644 [C++] Add hand-crafted Parquet to Arrow reconstruction test for nested reading

ARROW-1644 [C++][Parquet] Generalize existing null bitmap generation

ARROW-1644 [Python][Parquet] Expose EngineVersion in python arrow reader properties

ARROW-1644 [C++][Parquet] Add EngineVersion to properties to allow for toggling new vs old logic

ARROW-1644 [C++] Cleanup Parquet Arrow Schema code

ARROW-1644 [C++][Parquet] Implement non-vectorized array reconstruction logic.

ARROW-1644 [C++] Implement basic array-by-array reassembly logic

ARROW-1644 [C++] Create unified schema resolution code for Array reconstruction.

ARROW-1644 [C++][Parquet] Create randomized nested data generation round trip read/write unit tests

ARROW-1644 [C++] Expose a ReadValuesSpaced method that accepts a validity bitmap.

ARROW-1644 [C++] Refactor DefLevelsToBitmap

ARROW-1644 [C++][Parquet] Add support for schema translation from parquet nodes back to arrow for missing types

ARROW-1644 [C++][Parquet] Add a new level builder capable of handling nested data

ARROW-1644 [C++] Add schema conversion support for map type

ARROW-1644 [C++][Parquet] Incorporate new level generation logic in parquet write path with a flag to revert back to old logic

ARROW-1644 [C++][Parquet] Add a basic disabled unit test to excercise nesting functionality

ARROW-1644 [C++] Rebase https://github.com/apache/parquet-cpp/pull/462# onto arrow repo

ARROW-1644 [C++] Create performance benchmark for parquet reading