Right now, the streaming framework expects the output sof the steam process (mapper or reducer) are line
oriented UTF-8 text. This limit makes it impossible to use those programs whose outputs may be non-UTF-8
(international encoding, or maybe even binary data). Streaming can overcome this limit by introducing a simple
encoding protocol. For example, it can allow the mapper/reducer to hexencode its keys/values,
the framework decodes them in the Java side.
This way, as long as the mapper/reducer executables follow this encoding protocol,
they can output arabitary bytearray and the streaming framework can handle them.