Plumb OriginalType through to ConvertedType in file in ParquetMetadataConverter.
Merge changes from master.
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
Merge branch 'master' into plumb_original_type
add parquet cascading integration documentation
fix typo
fix grammar
plural for records
Merge branch 'master' into plumb_original_type
integrate parquet format 2.0
Merge pull request #245 from Parquet/integrate_parquet_format_2

integrate parquet format 2.0
Merge branch 'master' into plumb_original_type
implement error handler
handle extra field in data
add checkEnum