Support for non-block Snappy compression
Removed extraneous comment
Changed buff size to use Configuration
Organized imports
Changed snappy buffer to 3x page size
Made buffer size setting more reasonable
Copied Javadocs from SnappyCodec
Moved RawSnappyCodec to parquet.hadoop.codec
Updated full name of RawSnappyCodec in CompressionCodecName
Snappy compressor now adapts buffer sizes