Allow for custom compression codecs

I understand that the list of accepted compression codecs is explicity limited to uncompressed, snappy, gzip, and lzo. (See parquet.hadoop.metadata.CompressionCodecName.java) Is there a reason for this? Or is there an easy workaround? On the surface it seems like an unnecessary restriction.

I ask because I have written a custom codec to implement encryption and I'm unable to use it with Parquet, which is a real shame because it is the main storage format I was hoping to use.

Other thoughts on how to implement encryption in Parquet with this limitation?

**Reporter**: [Steven Anton](https://issues.apache.org/jira/secure/ViewProfile.jspa?name=santon)

_{**Note**: *This issue was originally created as [PARQUET-678](https://issues.apache.org/jira/browse/PARQUET-678). Please see the [migration documentation](https://issues.apache.org/jira/browse/PARQUET-2502) for further details.*}