[TACHYON-62] Netty

Netty implementation of the data server.

This patch is not done yet.  Its intent is to show the work I have right now for commenting.

This PR should not be merged until performance results come in.
Cool, so I would suggest to just update our doc accordingly to make it clear.
Also not sure if you have seen this link http://fasterdata.es.net/host-tuning/