Trying to write Parquet files.
Actually doing the Parquet writing; it doesn't work because it can't cast Long to Void
Now have a generic way to write a collection of Avro things with Parquet, using fancy reflection hacks to actually get at the schema, since Scala does not let you easily get the companion objects (holding static members) of Java things. If they even exist.
Now actually writing out created graph in Avro-in-Parquet format
Making the usage instructions more useful.